Trying to embed random puppy, img not working

+'use strict';
+
+module.exports = Error.captureStackTrace || function (error) {
+	var container = new Error();
+
+	Object.defineProperty(error, 'stack', {
+		configurable: true,
+		get: function getStack() {
+			var stack = container.stack;
+
+			Object.defineProperty(this, 'stack', {
+				value: stack
+			});
+
+			return stack;
+		}
+	});
+};

+The MIT License (MIT)
+
+Copyright (c) Vsevolod Strukchinsky <floatdrop@gmail.com> (github.com/floatdrop)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "capture-stack-trace",
+  "version": "1.0.1",
+  "description": "Error.captureStackTrace ponyfill",
+  "license": "MIT",
+  "repository": "floatdrop/capture-stack-trace",
+  "author": {
+    "name": "Vsevolod Strukchinsky",
+    "email": "floatdrop@gmail.com",
+    "url": "github.com/floatdrop"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "Error",
+    "captureStackTrace"
+  ],
+  "dependencies": {},
+  "devDependencies": {
+    "mocha": "*"
+  }
+}

+# capture-stack-trace [![Build Status](https://travis-ci.org/floatdrop/capture-stack-trace.svg?branch=master)](https://travis-ci.org/floatdrop/capture-stack-trace)
+
+> Ponyfill for Error.captureStackTrace
+
+
+## Install
+
+```
+$ npm install --save capture-stack-trace
+```
+
+
+## Usage
+
+```js
+var captureStackTrace = require('capture-stack-trace');
+
+captureStackTrace({});
+// => {stack: ...}
+```
+
+
+## API
+
+### captureStackTrace(error)
+
+#### error
+
+*Required*  
+Type: `Object`
+
+Target Object, that will recieve stack property.
+
+## License
+
+MIT © [Vsevolod Strukchinsky](http://github.com/floatdrop)

+'use strict';
+var captureStackTrace = require('capture-stack-trace');
+
+function inherits(ctor, superCtor) {
+	ctor.super_ = superCtor;
+	ctor.prototype = Object.create(superCtor.prototype, {
+		constructor: {
+			value: ctor,
+			enumerable: false,
+			writable: true,
+			configurable: true
+		}
+	});
+}
+
+module.exports = function createErrorClass(className, setup) {
+	if (typeof className !== 'string') {
+		throw new TypeError('Expected className to be a string');
+	}
+
+	if (/[^0-9a-zA-Z_$]/.test(className)) {
+		throw new Error('className contains invalid characters');
+	}
+
+	setup = setup || function (message) {
+		this.message = message;
+	};
+
+	var ErrorClass = function () {
+		Object.defineProperty(this, 'name', {
+			configurable: true,
+			value: className,
+			writable: true
+		});
+
+		captureStackTrace(this, this.constructor);
+
+		setup.apply(this, arguments);
+	};
+
+	inherits(ErrorClass, Error);
+
+	return ErrorClass;
+};

+The MIT License (MIT)
+
+Copyright (c) Vsevolod Strukchinsky <floatdrop@gmail.com> (github.com/floatdrop)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "create-error-class",
+  "version": "3.0.2",
+  "description": "Create Error classes",
+  "license": "MIT",
+  "repository": "floatdrop/create-error-class",
+  "author": {
+    "name": "Vsevolod Strukchinsky",
+    "email": "floatdrop@gmail.com",
+    "url": "github.com/floatdrop"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    ""
+  ],
+  "dependencies": {
+    "capture-stack-trace": "^1.0.0"
+  },
+  "devDependencies": {
+    "mocha": "*"
+  }
+}

+# create-error-class [![Build Status](https://travis-ci.org/floatdrop/create-error-class.svg?branch=master)](https://travis-ci.org/floatdrop/create-error-class)
+
+> Create error class
+
+
+## Install
+
+```
+$ npm install --save create-error-class
+```
+
+
+## Usage
+
+```js
+var createErrorClass = require('create-error-class');
+
+var HTTPError = createErrorClass('HTTPError', function (props) {
+	this.message = 'Status code is ' + props.statusCode;
+});
+
+throw new HTTPError({statusCode: 404});
+```
+
+
+## API
+
+### createErrorClass(className, [setup])
+
+Return constructor of Errors with `className`.
+
+#### className
+
+*Required*  
+Type: `string`
+
+Class name of Error Object. Should contain characters from `[0-9a-zA-Z_$]` range.
+
+#### setup
+Type: `function`
+
+Setup function, that will be called after each Error object is created from constructor with context of Error object.
+
+By default `setup` function sets `this.message` as first argument:
+
+```js
+var MyError = createErrorClass('MyError');
+
+new MyError('Something gone wrong!').message; // => 'Something gone wrong!'
+```
+
+## License
+
+MIT © [Vsevolod Strukchinsky](http://github.com/floatdrop)

+The MIT License (MIT)
+
+Copyright (c) 2016 David Frank
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

+node-fetch
+==========
+
+[![npm version][npm-image]][npm-url]
+[![build status][travis-image]][travis-url]
+[![coverage status][codecov-image]][codecov-url]
+[![install size][install-size-image]][install-size-url]
+[![Discord][discord-image]][discord-url]
+
+A light-weight module that brings `window.fetch` to Node.js
+
+(We are looking for [v2 maintainers and collaborators](https://github.com/bitinn/node-fetch/issues/567))
+
+[![Backers][opencollective-image]][opencollective-url]
+
+<!-- TOC -->
+
+- [Motivation](#motivation)
+- [Features](#features)
+- [Difference from client-side fetch](#difference-from-client-side-fetch)
+- [Installation](#installation)
+- [Loading and configuring the module](#loading-and-configuring-the-module)
+- [Common Usage](#common-usage)
+    - [Plain text or HTML](#plain-text-or-html)
+    - [JSON](#json)
+    - [Simple Post](#simple-post)
+    - [Post with JSON](#post-with-json)
+    - [Post with form parameters](#post-with-form-parameters)
+    - [Handling exceptions](#handling-exceptions)
+    - [Handling client and server errors](#handling-client-and-server-errors)
+- [Advanced Usage](#advanced-usage)
+    - [Streams](#streams)
+    - [Buffer](#buffer)
+    - [Accessing Headers and other Meta data](#accessing-headers-and-other-meta-data)
+    - [Extract Set-Cookie Header](#extract-set-cookie-header)
+    - [Post data using a file stream](#post-data-using-a-file-stream)
+    - [Post with form-data (detect multipart)](#post-with-form-data-detect-multipart)
+    - [Request cancellation with AbortSignal](#request-cancellation-with-abortsignal)
+- [API](#api)
+    - [fetch(url[, options])](#fetchurl-options)
+    - [Options](#options)
+    - [Class: Request](#class-request)
+    - [Class: Response](#class-response)
+    - [Class: Headers](#class-headers)
+    - [Interface: Body](#interface-body)
+    - [Class: FetchError](#class-fetcherror)
+- [License](#license)
+- [Acknowledgement](#acknowledgement)
+
+<!-- /TOC -->
+
+## Motivation
+
+Instead of implementing `XMLHttpRequest` in Node.js to run browser-specific [Fetch polyfill](https://github.com/github/fetch), why not go from native `http` to `fetch` API directly? Hence, `node-fetch`, minimal code for a `window.fetch` compatible API on Node.js runtime.
+
+See Matt Andrews' [isomorphic-fetch](https://github.com/matthew-andrews/isomorphic-fetch) or Leonardo Quixada's [cross-fetch](https://github.com/lquixada/cross-fetch) for isomorphic usage (exports `node-fetch` for server-side, `whatwg-fetch` for client-side).
+
+## Features
+
+- Stay consistent with `window.fetch` API.
+- Make conscious trade-off when following [WHATWG fetch spec][whatwg-fetch] and [stream spec](https://streams.spec.whatwg.org/) implementation details, document known differences.
+- Use native promise but allow substituting it with [insert your favorite promise library].
+- Use native Node streams for body on both request and response.
+- Decode content encoding (gzip/deflate) properly and convert string output (such as `res.text()` and `res.json()`) to UTF-8 automatically.
+- Useful extensions such as timeout, redirect limit, response size limit, [explicit errors](ERROR-HANDLING.md) for troubleshooting.
+
+## Difference from client-side fetch
+
+- See [Known Differences](LIMITS.md) for details.
+- If you happen to use a missing feature that `window.fetch` offers, feel free to open an issue.
+- Pull requests are welcomed too!
+
+## Installation
+
+Current stable release (`2.x`)
+
+```sh
+$ npm install node-fetch
+```
+
+## Loading and configuring the module
+We suggest you load the module via `require` until the stabilization of ES modules in node:
+```js
+const fetch = require('node-fetch');
+```
+
+If you are using a Promise library other than native, set it through `fetch.Promise`:
+```js
+const Bluebird = require('bluebird');
+
+fetch.Promise = Bluebird;
+```
+
+## Common Usage
+
+NOTE: The documentation below is up-to-date with `2.x` releases; see the [`1.x` readme](https://github.com/bitinn/node-fetch/blob/1.x/README.md), [changelog](https://github.com/bitinn/node-fetch/blob/1.x/CHANGELOG.md) and [2.x upgrade guide](UPGRADE-GUIDE.md) for the differences.
+
+#### Plain text or HTML
+```js
+fetch('https://github.com/')
+    .then(res => res.text())
+    .then(body => console.log(body));
+```
+
+#### JSON
+
+```js
+
+fetch('https://api.github.com/users/github')
+    .then(res => res.json())
+    .then(json => console.log(json));
+```
+
+#### Simple Post
+```js
+fetch('https://httpbin.org/post', { method: 'POST', body: 'a=1' })
+    .then(res => res.json()) // expecting a json response
+    .then(json => console.log(json));
+```
+
+#### Post with JSON
+
+```js
+const body = { a: 1 };
+
+fetch('https://httpbin.org/post', {
+        method: 'post',
+        body:    JSON.stringify(body),
+        headers: { 'Content-Type': 'application/json' },
+    })
+    .then(res => res.json())
+    .then(json => console.log(json));
+```
+
+#### Post with form parameters
+`URLSearchParams` is available in Node.js as of v7.5.0. See [official documentation](https://nodejs.org/api/url.html#url_class_urlsearchparams) for more usage methods.
+
+NOTE: The `Content-Type` header is only set automatically to `x-www-form-urlencoded` when an instance of `URLSearchParams` is given as such:
+
+```js
+const { URLSearchParams } = require('url');
+
+const params = new URLSearchParams();
+params.append('a', 1);
+
+fetch('https://httpbin.org/post', { method: 'POST', body: params })
+    .then(res => res.json())
+    .then(json => console.log(json));
+```
+
+#### Handling exceptions
+NOTE: 3xx-5xx responses are *NOT* exceptions and should be handled in `then()`; see the next section for more information.
+
+Adding a catch to the fetch promise chain will catch *all* exceptions, such as errors originating from node core libraries, network errors and operational errors, which are instances of FetchError. See the [error handling document](ERROR-HANDLING.md)  for more details.
+
+```js
+fetch('https://domain.invalid/')
+    .catch(err => console.error(err));
+```
+
+#### Handling client and server errors
+It is common to create a helper function to check that the response contains no client (4xx) or server (5xx) error responses:
+
+```js
+function checkStatus(res) {
+    if (res.ok) { // res.status >= 200 && res.status < 300
+        return res;
+    } else {
+        throw MyCustomError(res.statusText);
+    }
+}
+
+fetch('https://httpbin.org/status/400')
+    .then(checkStatus)
+    .then(res => console.log('will not get here...'))
+```
+
+## Advanced Usage
+
+#### Streams
+The "Node.js way" is to use streams when possible:
+
+```js
+fetch('https://assets-cdn.github.com/images/modules/logos_page/Octocat.png')
+    .then(res => {
+        const dest = fs.createWriteStream('./octocat.png');
+        res.body.pipe(dest);
+    });
+```
+
+#### Buffer
+If you prefer to cache binary data in full, use buffer(). (NOTE: `buffer()` is a `node-fetch`-only API)
+
+```js
+const fileType = require('file-type');
+
+fetch('https://assets-cdn.github.com/images/modules/logos_page/Octocat.png')
+    .then(res => res.buffer())
+    .then(buffer => fileType(buffer))
+    .then(type => { /* ... */ });
+```
+
+#### Accessing Headers and other Meta data
+```js
+fetch('https://github.com/')
+    .then(res => {
+        console.log(res.ok);
+        console.log(res.status);
+        console.log(res.statusText);
+        console.log(res.headers.raw());
+        console.log(res.headers.get('content-type'));
+    });
+```
+
+#### Extract Set-Cookie Header
+
+Unlike browsers, you can access raw `Set-Cookie` headers manually using `Headers.raw()`. This is a `node-fetch` only API.
+
+```js
+fetch(url).then(res => {
+    // returns an array of values, instead of a string of comma-separated values
+    console.log(res.headers.raw()['set-cookie']);
+});
+```
+
+#### Post data using a file stream
+
+```js
+const { createReadStream } = require('fs');
+
+const stream = createReadStream('input.txt');
+
+fetch('https://httpbin.org/post', { method: 'POST', body: stream })
+    .then(res => res.json())
+    .then(json => console.log(json));
+```
+
+#### Post with form-data (detect multipart)
+
+```js
+const FormData = require('form-data');
+
+const form = new FormData();
+form.append('a', 1);
+
+fetch('https://httpbin.org/post', { method: 'POST', body: form })
+    .then(res => res.json())
+    .then(json => console.log(json));
+
+// OR, using custom headers
+// NOTE: getHeaders() is non-standard API
+
+const form = new FormData();
+form.append('a', 1);
+
+const options = {
+    method: 'POST',
+    body: form,
+    headers: form.getHeaders()
+}
+
+fetch('https://httpbin.org/post', options)
+    .then(res => res.json())
+    .then(json => console.log(json));
+```
+
+#### Request cancellation with AbortSignal
+
+> NOTE: You may cancel streamed requests only on Node >= v8.0.0
+
+You may cancel requests with `AbortController`. A suggested implementation is [`abort-controller`](https://www.npmjs.com/package/abort-controller).
+
+An example of timing out a request after 150ms could be achieved as the following:
+
+```js
+import AbortController from 'abort-controller';
+
+const controller = new AbortController();
+const timeout = setTimeout(
+  () => { controller.abort(); },
+  150,
+);
+
+fetch(url, { signal: controller.signal })
+  .then(res => res.json())
+  .then(
+    data => {
+      useData(data)
+    },
+    err => {
+      if (err.name === 'AbortError') {
+        // request was aborted
+      }
+    },
+  )
+  .finally(() => {
+    clearTimeout(timeout);
+  });
+```
+
+See [test cases](https://github.com/bitinn/node-fetch/blob/master/test/test.js) for more examples.
+
+
+## API
+
+### fetch(url[, options])
+
+- `url` A string representing the URL for fetching
+- `options` [Options](#fetch-options) for the HTTP(S) request
+- Returns: <code>Promise&lt;[Response](#class-response)&gt;</code>
+
+Perform an HTTP(S) fetch.
+
+`url` should be an absolute url, such as `https://example.com/`. A path-relative URL (`/file/under/root`) or protocol-relative URL (`//can-be-http-or-https.com/`) will result in a rejected `Promise`.
+
+<a id="fetch-options"></a>
+### Options
+
+The default values are shown after each option key.
+
+```js
+{
+    // These properties are part of the Fetch Standard
+    method: 'GET',
+    headers: {},        // request headers. format is the identical to that accepted by the Headers constructor (see below)
+    body: null,         // request body. can be null, a string, a Buffer, a Blob, or a Node.js Readable stream
+    redirect: 'follow', // set to `manual` to extract redirect headers, `error` to reject redirect
+    signal: null,       // pass an instance of AbortSignal to optionally abort requests
+
+    // The following properties are node-fetch extensions
+    follow: 20,         // maximum redirect count. 0 to not follow redirect
+    timeout: 0,         // req/res timeout in ms, it resets on redirect. 0 to disable (OS limit applies). Signal is recommended instead.
+    compress: true,     // support gzip/deflate content encoding. false to disable
+    size: 0,            // maximum response body size in bytes. 0 to disable
+    agent: null         // http(s).Agent instance or function that returns an instance (see below)
+}
+```
+
+##### Default Headers
+
+If no values are set, the following request headers will be sent automatically:
+
+Header              | Value
+------------------- | --------------------------------------------------------
+`Accept-Encoding`   | `gzip,deflate` _(when `options.compress === true`)_
+`Accept`            | `*/*`
+`Connection`        | `close` _(when no `options.agent` is present)_
+`Content-Length`    | _(automatically calculated, if possible)_
+`Transfer-Encoding` | `chunked` _(when `req.body` is a stream)_
+`User-Agent`        | `node-fetch/1.0 (+https://github.com/bitinn/node-fetch)`
+
+Note: when `body` is a `Stream`, `Content-Length` is not set automatically.
+
+##### Custom Agent
+
+The `agent` option allows you to specify networking related options which are out of the scope of Fetch, including and not limited to the following:
+
+- Support self-signed certificate
+- Use only IPv4 or IPv6
+- Custom DNS Lookup
+
+See [`http.Agent`](https://nodejs.org/api/http.html#http_new_agent_options) for more information.
+
+In addition, the `agent` option accepts a function that returns `http`(s)`.Agent` instance given current [URL](https://nodejs.org/api/url.html), this is useful during a redirection chain across HTTP and HTTPS protocol.
+
+```js
+const httpAgent = new http.Agent({
+    keepAlive: true
+});
+const httpsAgent = new https.Agent({
+    keepAlive: true
+});
+
+const options = {
+    agent: function (_parsedURL) {
+        if (_parsedURL.protocol == 'http:') {
+            return httpAgent;
+        } else {
+            return httpsAgent;
+        }
+    }
+}
+```
+
+<a id="class-request"></a>
+### Class: Request
+
+An HTTP(S) request containing information about URL, method, headers, and the body. This class implements the [Body](#iface-body) interface.
+
+Due to the nature of Node.js, the following properties are not implemented at this moment:
+
+- `type`
+- `destination`
+- `referrer`
+- `referrerPolicy`
+- `mode`
+- `credentials`
+- `cache`
+- `integrity`
+- `keepalive`
+
+The following node-fetch extension properties are provided:
+
+- `follow`
+- `compress`
+- `counter`
+- `agent`
+
+See [options](#fetch-options) for exact meaning of these extensions.
+
+#### new Request(input[, options])
+
+<small>*(spec-compliant)*</small>
+
+- `input` A string representing a URL, or another `Request` (which will be cloned)
+- `options` [Options][#fetch-options] for the HTTP(S) request
+
+Constructs a new `Request` object. The constructor is identical to that in the [browser](https://developer.mozilla.org/en-US/docs/Web/API/Request/Request).
+
+In most cases, directly `fetch(url, options)` is simpler than creating a `Request` object.
+
+<a id="class-response"></a>
+### Class: Response
+
+An HTTP(S) response. This class implements the [Body](#iface-body) interface.
+
+The following properties are not implemented in node-fetch at this moment:
+
+- `Response.error()`
+- `Response.redirect()`
+- `type`
+- `trailer`
+
+#### new Response([body[, options]])
+
+<small>*(spec-compliant)*</small>
+
+- `body` A `String` or [`Readable` stream][node-readable]
+- `options` A [`ResponseInit`][response-init] options dictionary
+
+Constructs a new `Response` object. The constructor is identical to that in the [browser](https://developer.mozilla.org/en-US/docs/Web/API/Response/Response).
+
+Because Node.js does not implement service workers (for which this class was designed), one rarely has to construct a `Response` directly.
+
+#### response.ok
+
+<small>*(spec-compliant)*</small>
+
+Convenience property representing if the request ended normally. Will evaluate to true if the response status was greater than or equal to 200 but smaller than 300.
+
+#### response.redirected
+
+<small>*(spec-compliant)*</small>
+
+Convenience property representing if the request has been redirected at least once. Will evaluate to true if the internal redirect counter is greater than 0.
+
+<a id="class-headers"></a>
+### Class: Headers
+
+This class allows manipulating and iterating over a set of HTTP headers. All methods specified in the [Fetch Standard][whatwg-fetch] are implemented.
+
+#### new Headers([init])
+
+<small>*(spec-compliant)*</small>
+
+- `init` Optional argument to pre-fill the `Headers` object
+
+Construct a new `Headers` object. `init` can be either `null`, a `Headers` object, an key-value map object or any iterable object.
+
+```js
+// Example adapted from https://fetch.spec.whatwg.org/#example-headers-class
+
+const meta = {
+  'Content-Type': 'text/xml',
+  'Breaking-Bad': '<3'
+};
+const headers = new Headers(meta);
+
+// The above is equivalent to
+const meta = [
+  [ 'Content-Type', 'text/xml' ],
+  [ 'Breaking-Bad', '<3' ]
+];
+const headers = new Headers(meta);
+
+// You can in fact use any iterable objects, like a Map or even another Headers
+const meta = new Map();
+meta.set('Content-Type', 'text/xml');
+meta.set('Breaking-Bad', '<3');
+const headers = new Headers(meta);
+const copyOfHeaders = new Headers(headers);
+```
+
+<a id="iface-body"></a>
+### Interface: Body
+
+`Body` is an abstract interface with methods that are applicable to both `Request` and `Response` classes.
+
+The following methods are not yet implemented in node-fetch at this moment:
+
+- `formData()`
+
+#### body.body
+
+<small>*(deviation from spec)*</small>
+
+* Node.js [`Readable` stream][node-readable]
+
+Data are encapsulated in the `Body` object. Note that while the [Fetch Standard][whatwg-fetch] requires the property to always be a WHATWG `ReadableStream`, in node-fetch it is a Node.js [`Readable` stream][node-readable].
+
+#### body.bodyUsed
+
+<small>*(spec-compliant)*</small>
+
+* `Boolean`
+
+A boolean property for if this body has been consumed. Per the specs, a consumed body cannot be used again.
+
+#### body.arrayBuffer()
+#### body.blob()
+#### body.json()
+#### body.text()
+
+<small>*(spec-compliant)*</small>
+
+* Returns: <code>Promise</code>
+
+Consume the body and return a promise that will resolve to one of these formats.
+
+#### body.buffer()
+
+<small>*(node-fetch extension)*</small>
+
+* Returns: <code>Promise&lt;Buffer&gt;</code>
+
+Consume the body and return a promise that will resolve to a Buffer.
+
+#### body.textConverted()
+
+<small>*(node-fetch extension)*</small>
+
+* Returns: <code>Promise&lt;String&gt;</code>
+
+Identical to `body.text()`, except instead of always converting to UTF-8, encoding sniffing will be performed and text converted to UTF-8 if possible.
+
+(This API requires an optional dependency of the npm package [encoding](https://www.npmjs.com/package/encoding), which you need to install manually. `webpack` users may see [a warning message](https://github.com/bitinn/node-fetch/issues/412#issuecomment-379007792) due to this optional dependency.)
+
+<a id="class-fetcherror"></a>
+### Class: FetchError
+
+<small>*(node-fetch extension)*</small>
+
+An operational error in the fetching process. See [ERROR-HANDLING.md][] for more info.
+
+<a id="class-aborterror"></a>
+### Class: AbortError
+
+<small>*(node-fetch extension)*</small>
+
+An Error thrown when the request is aborted in response to an `AbortSignal`'s `abort` event. It has a `name` property of `AbortError`. See [ERROR-HANDLING.MD][] for more info.
+
+## Acknowledgement
+
+Thanks to [github/fetch](https://github.com/github/fetch) for providing a solid implementation reference.
+
+`node-fetch` v1 was maintained by [@bitinn](https://github.com/bitinn); v2 was maintained by [@TimothyGu](https://github.com/timothygu), [@bitinn](https://github.com/bitinn) and [@jimmywarting](https://github.com/jimmywarting); v2 readme is written by [@jkantr](https://github.com/jkantr).
+
+## License
+
+MIT
+
+[npm-image]: https://flat.badgen.net/npm/v/node-fetch
+[npm-url]: https://www.npmjs.com/package/node-fetch
+[travis-image]: https://flat.badgen.net/travis/bitinn/node-fetch
+[travis-url]: https://travis-ci.org/bitinn/node-fetch
+[codecov-image]: https://flat.badgen.net/codecov/c/github/bitinn/node-fetch/master
+[codecov-url]: https://codecov.io/gh/bitinn/node-fetch
+[install-size-image]: https://flat.badgen.net/packagephobia/install/node-fetch
+[install-size-url]: https://packagephobia.now.sh/result?p=node-fetch
+[discord-image]: https://img.shields.io/discord/619915844268326952?color=%237289DA&label=Discord&style=flat-square
+[discord-url]: https://discord.gg/Zxbndcm
+[opencollective-image]: https://opencollective.com/node-fetch/backers.svg
+[opencollective-url]: https://opencollective.com/node-fetch
+[whatwg-fetch]: https://fetch.spec.whatwg.org/
+[response-init]: https://fetch.spec.whatwg.org/#responseinit
+[node-readable]: https://nodejs.org/api/stream.html#stream_readable_streams
+[mdn-headers]: https://developer.mozilla.org/en-US/docs/Web/API/Headers
+[LIMITS.md]: https://github.com/bitinn/node-fetch/blob/master/LIMITS.md
+[ERROR-HANDLING.md]: https://github.com/bitinn/node-fetch/blob/master/ERROR-HANDLING.md
+[UPGRADE-GUIDE.md]: https://github.com/bitinn/node-fetch/blob/master/UPGRADE-GUIDE.md

+"use strict";
+
+// ref: https://github.com/tc39/proposal-global
+var getGlobal = function () {
+	// the only reliable means to get the global object is
+	// `Function('return this')()`
+	// However, this causes CSP violations in Chrome apps.
+	if (typeof self !== 'undefined') { return self; }
+	if (typeof window !== 'undefined') { return window; }
+	if (typeof global !== 'undefined') { return global; }
+	throw new Error('unable to locate global object');
+}
+
+var global = getGlobal();
+
+module.exports = exports = global.fetch;
+
+// Needed for TypeScript and Webpack.
+if (global.fetch) {
+	exports.default = global.fetch.bind(global);
+}
+
+exports.Headers = global.Headers;
+exports.Request = global.Request;
+exports.Response = global.Response;
\ No newline at end of file

+process.emitWarning("The .es.js file is deprecated. Use .mjs instead.");
+
+import Stream from 'stream';
+import http from 'http';
+import Url from 'url';
+import whatwgUrl from 'whatwg-url';
+import https from 'https';
+import zlib from 'zlib';
+
+// Based on https://github.com/tmpvar/jsdom/blob/aa85b2abf07766ff7bf5c1f6daafb3726f2f2db5/lib/jsdom/living/blob.js
+
+// fix for "Readable" isn't a named export issue
+const Readable = Stream.Readable;
+
+const BUFFER = Symbol('buffer');
+const TYPE = Symbol('type');
+
+class Blob {
+	constructor() {
+		this[TYPE] = '';
+
+		const blobParts = arguments[0];
+		const options = arguments[1];
+
+		const buffers = [];
+		let size = 0;
+
+		if (blobParts) {
+			const a = blobParts;
+			const length = Number(a.length);
+			for (let i = 0; i < length; i++) {
+				const element = a[i];
+				let buffer;
+				if (element instanceof Buffer) {
+					buffer = element;
+				} else if (ArrayBuffer.isView(element)) {
+					buffer = Buffer.from(element.buffer, element.byteOffset, element.byteLength);
+				} else if (element instanceof ArrayBuffer) {
+					buffer = Buffer.from(element);
+				} else if (element instanceof Blob) {
+					buffer = element[BUFFER];
+				} else {
+					buffer = Buffer.from(typeof element === 'string' ? element : String(element));
+				}
+				size += buffer.length;
+				buffers.push(buffer);
+			}
+		}
+
+		this[BUFFER] = Buffer.concat(buffers);
+
+		let type = options && options.type !== undefined && String(options.type).toLowerCase();
+		if (type && !/[^\u0020-\u007E]/.test(type)) {
+			this[TYPE] = type;
+		}
+	}
+	get size() {
+		return this[BUFFER].length;
+	}
+	get type() {
+		return this[TYPE];
+	}
+	text() {
+		return Promise.resolve(this[BUFFER].toString());
+	}
+	arrayBuffer() {
+		const buf = this[BUFFER];
+		const ab = buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		return Promise.resolve(ab);
+	}
+	stream() {
+		const readable = new Readable();
+		readable._read = function () {};
+		readable.push(this[BUFFER]);
+		readable.push(null);
+		return readable;
+	}
+	toString() {
+		return '[object Blob]';
+	}
+	slice() {
+		const size = this.size;
+
+		const start = arguments[0];
+		const end = arguments[1];
+		let relativeStart, relativeEnd;
+		if (start === undefined) {
+			relativeStart = 0;
+		} else if (start < 0) {
+			relativeStart = Math.max(size + start, 0);
+		} else {
+			relativeStart = Math.min(start, size);
+		}
+		if (end === undefined) {
+			relativeEnd = size;
+		} else if (end < 0) {
+			relativeEnd = Math.max(size + end, 0);
+		} else {
+			relativeEnd = Math.min(end, size);
+		}
+		const span = Math.max(relativeEnd - relativeStart, 0);
+
+		const buffer = this[BUFFER];
+		const slicedBuffer = buffer.slice(relativeStart, relativeStart + span);
+		const blob = new Blob([], { type: arguments[2] });
+		blob[BUFFER] = slicedBuffer;
+		return blob;
+	}
+}
+
+Object.defineProperties(Blob.prototype, {
+	size: { enumerable: true },
+	type: { enumerable: true },
+	slice: { enumerable: true }
+});
+
+Object.defineProperty(Blob.prototype, Symbol.toStringTag, {
+	value: 'Blob',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+/**
+ * fetch-error.js
+ *
+ * FetchError interface for operational errors
+ */
+
+/**
+ * Create FetchError instance
+ *
+ * @param   String      message      Error message for human
+ * @param   String      type         Error type for machine
+ * @param   String      systemError  For Node.js system error
+ * @return  FetchError
+ */
+function FetchError(message, type, systemError) {
+  Error.call(this, message);
+
+  this.message = message;
+  this.type = type;
+
+  // when err.type is `system`, err.code contains system error code
+  if (systemError) {
+    this.code = this.errno = systemError.code;
+  }
+
+  // hide custom error implementation details from end-users
+  Error.captureStackTrace(this, this.constructor);
+}
+
+FetchError.prototype = Object.create(Error.prototype);
+FetchError.prototype.constructor = FetchError;
+FetchError.prototype.name = 'FetchError';
+
+let convert;
+try {
+	convert = require('encoding').convert;
+} catch (e) {}
+
+const INTERNALS = Symbol('Body internals');
+
+// fix an issue where "PassThrough" isn't a named export for node <10
+const PassThrough = Stream.PassThrough;
+
+/**
+ * Body mixin
+ *
+ * Ref: https://fetch.spec.whatwg.org/#body
+ *
+ * @param   Stream  body  Readable stream
+ * @param   Object  opts  Response options
+ * @return  Void
+ */
+function Body(body) {
+	var _this = this;
+
+	var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
+	    _ref$size = _ref.size;
+
+	let size = _ref$size === undefined ? 0 : _ref$size;
+	var _ref$timeout = _ref.timeout;
+	let timeout = _ref$timeout === undefined ? 0 : _ref$timeout;
+
+	if (body == null) {
+		// body is undefined or null
+		body = null;
+	} else if (isURLSearchParams(body)) {
+		// body is a URLSearchParams
+		body = Buffer.from(body.toString());
+	} else if (isBlob(body)) ; else if (Buffer.isBuffer(body)) ; else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
+		// body is ArrayBuffer
+		body = Buffer.from(body);
+	} else if (ArrayBuffer.isView(body)) {
+		// body is ArrayBufferView
+		body = Buffer.from(body.buffer, body.byteOffset, body.byteLength);
+	} else if (body instanceof Stream) ; else {
+		// none of the above
+		// coerce to string then buffer
+		body = Buffer.from(String(body));
+	}
+	this[INTERNALS] = {
+		body,
+		disturbed: false,
+		error: null
+	};
+	this.size = size;
+	this.timeout = timeout;
+
+	if (body instanceof Stream) {
+		body.on('error', function (err) {
+			const error = err.name === 'AbortError' ? err : new FetchError(`Invalid response body while trying to fetch ${_this.url}: ${err.message}`, 'system', err);
+			_this[INTERNALS].error = error;
+		});
+	}
+}
+
+Body.prototype = {
+	get body() {
+		return this[INTERNALS].body;
+	},
+
+	get bodyUsed() {
+		return this[INTERNALS].disturbed;
+	},
+
+	/**
+  * Decode response as ArrayBuffer
+  *
+  * @return  Promise
+  */
+	arrayBuffer() {
+		return consumeBody.call(this).then(function (buf) {
+			return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		});
+	},
+
+	/**
+  * Return raw response as Blob
+  *
+  * @return Promise
+  */
+	blob() {
+		let ct = this.headers && this.headers.get('content-type') || '';
+		return consumeBody.call(this).then(function (buf) {
+			return Object.assign(
+			// Prevent copying
+			new Blob([], {
+				type: ct.toLowerCase()
+			}), {
+				[BUFFER]: buf
+			});
+		});
+	},
+
+	/**
+  * Decode response as json
+  *
+  * @return  Promise
+  */
+	json() {
+		var _this2 = this;
+
+		return consumeBody.call(this).then(function (buffer) {
+			try {
+				return JSON.parse(buffer.toString());
+			} catch (err) {
+				return Body.Promise.reject(new FetchError(`invalid json response body at ${_this2.url} reason: ${err.message}`, 'invalid-json'));
+			}
+		});
+	},
+
+	/**
+  * Decode response as text
+  *
+  * @return  Promise
+  */
+	text() {
+		return consumeBody.call(this).then(function (buffer) {
+			return buffer.toString();
+		});
+	},
+
+	/**
+  * Decode response as buffer (non-spec api)
+  *
+  * @return  Promise
+  */
+	buffer() {
+		return consumeBody.call(this);
+	},
+
+	/**
+  * Decode response as text, while automatically detecting the encoding and
+  * trying to decode to UTF-8 (non-spec api)
+  *
+  * @return  Promise
+  */
+	textConverted() {
+		var _this3 = this;
+
+		return consumeBody.call(this).then(function (buffer) {
+			return convertBody(buffer, _this3.headers);
+		});
+	}
+};
+
+// In browsers, all properties are enumerable.
+Object.defineProperties(Body.prototype, {
+	body: { enumerable: true },
+	bodyUsed: { enumerable: true },
+	arrayBuffer: { enumerable: true },
+	blob: { enumerable: true },
+	json: { enumerable: true },
+	text: { enumerable: true }
+});
+
+Body.mixIn = function (proto) {
+	for (const name of Object.getOwnPropertyNames(Body.prototype)) {
+		// istanbul ignore else: future proof
+		if (!(name in proto)) {
+			const desc = Object.getOwnPropertyDescriptor(Body.prototype, name);
+			Object.defineProperty(proto, name, desc);
+		}
+	}
+};
+
+/**
+ * Consume and convert an entire Body to a Buffer.
+ *
+ * Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body
+ *
+ * @return  Promise
+ */
+function consumeBody() {
+	var _this4 = this;
+
+	if (this[INTERNALS].disturbed) {
+		return Body.Promise.reject(new TypeError(`body used already for: ${this.url}`));
+	}
+
+	this[INTERNALS].disturbed = true;
+
+	if (this[INTERNALS].error) {
+		return Body.Promise.reject(this[INTERNALS].error);
+	}
+
+	let body = this.body;
+
+	// body is null
+	if (body === null) {
+		return Body.Promise.resolve(Buffer.alloc(0));
+	}
+
+	// body is blob
+	if (isBlob(body)) {
+		body = body.stream();
+	}
+
+	// body is buffer
+	if (Buffer.isBuffer(body)) {
+		return Body.Promise.resolve(body);
+	}
+
+	// istanbul ignore if: should never happen
+	if (!(body instanceof Stream)) {
+		return Body.Promise.resolve(Buffer.alloc(0));
+	}
+
+	// body is stream
+	// get ready to actually consume the body
+	let accum = [];
+	let accumBytes = 0;
+	let abort = false;
+
+	return new Body.Promise(function (resolve, reject) {
+		let resTimeout;
+
+		// allow timeout on slow response body
+		if (_this4.timeout) {
+			resTimeout = setTimeout(function () {
+				abort = true;
+				reject(new FetchError(`Response timeout while trying to fetch ${_this4.url} (over ${_this4.timeout}ms)`, 'body-timeout'));
+			}, _this4.timeout);
+		}
+
+		// handle stream errors
+		body.on('error', function (err) {
+			if (err.name === 'AbortError') {
+				// if the request was aborted, reject with this Error
+				abort = true;
+				reject(err);
+			} else {
+				// other errors, such as incorrect content-encoding
+				reject(new FetchError(`Invalid response body while trying to fetch ${_this4.url}: ${err.message}`, 'system', err));
+			}
+		});
+
+		body.on('data', function (chunk) {
+			if (abort || chunk === null) {
+				return;
+			}
+
+			if (_this4.size && accumBytes + chunk.length > _this4.size) {
+				abort = true;
+				reject(new FetchError(`content size at ${_this4.url} over limit: ${_this4.size}`, 'max-size'));
+				return;
+			}
+
+			accumBytes += chunk.length;
+			accum.push(chunk);
+		});
+
+		body.on('end', function () {
+			if (abort) {
+				return;
+			}
+
+			clearTimeout(resTimeout);
+
+			try {
+				resolve(Buffer.concat(accum, accumBytes));
+			} catch (err) {
+				// handle streams that have accumulated too much data (issue #414)
+				reject(new FetchError(`Could not create Buffer from response body for ${_this4.url}: ${err.message}`, 'system', err));
+			}
+		});
+	});
+}
+
+/**
+ * Detect buffer encoding and convert to target encoding
+ * ref: http://www.w3.org/TR/2011/WD-html5-20110113/parsing.html#determining-the-character-encoding
+ *
+ * @param   Buffer  buffer    Incoming buffer
+ * @param   String  encoding  Target encoding
+ * @return  String
+ */
+function convertBody(buffer, headers) {
+	if (typeof convert !== 'function') {
+		throw new Error('The package `encoding` must be installed to use the textConverted() function');
+	}
+
+	const ct = headers.get('content-type');
+	let charset = 'utf-8';
+	let res, str;
+
+	// header
+	if (ct) {
+		res = /charset=([^;]*)/i.exec(ct);
+	}
+
+	// no charset in content type, peek at response body for at most 1024 bytes
+	str = buffer.slice(0, 1024).toString();
+
+	// html5
+	if (!res && str) {
+		res = /<meta.+?charset=(['"])(.+?)\1/i.exec(str);
+	}
+
+	// html4
+	if (!res && str) {
+		res = /<meta[\s]+?http-equiv=(['"])content-type\1[\s]+?content=(['"])(.+?)\2/i.exec(str);
+		if (!res) {
+			res = /<meta[\s]+?content=(['"])(.+?)\1[\s]+?http-equiv=(['"])content-type\3/i.exec(str);
+			if (res) {
+				res.pop(); // drop last quote
+			}
+		}
+
+		if (res) {
+			res = /charset=(.*)/i.exec(res.pop());
+		}
+	}
+
+	// xml
+	if (!res && str) {
+		res = /<\?xml.+?encoding=(['"])(.+?)\1/i.exec(str);
+	}
+
+	// found charset
+	if (res) {
+		charset = res.pop();
+
+		// prevent decode issues when sites use incorrect encoding
+		// ref: https://hsivonen.fi/encoding-menu/
+		if (charset === 'gb2312' || charset === 'gbk') {
+			charset = 'gb18030';
+		}
+	}
+
+	// turn raw buffers into a single utf-8 buffer
+	return convert(buffer, 'UTF-8', charset).toString();
+}
+
+/**
+ * Detect a URLSearchParams object
+ * ref: https://github.com/bitinn/node-fetch/issues/296#issuecomment-307598143
+ *
+ * @param   Object  obj     Object to detect by type or brand
+ * @return  String
+ */
+function isURLSearchParams(obj) {
+	// Duck-typing as a necessary condition.
+	if (typeof obj !== 'object' || typeof obj.append !== 'function' || typeof obj.delete !== 'function' || typeof obj.get !== 'function' || typeof obj.getAll !== 'function' || typeof obj.has !== 'function' || typeof obj.set !== 'function') {
+		return false;
+	}
+
+	// Brand-checking and more duck-typing as optional condition.
+	return obj.constructor.name === 'URLSearchParams' || Object.prototype.toString.call(obj) === '[object URLSearchParams]' || typeof obj.sort === 'function';
+}
+
+/**
+ * Check if `obj` is a W3C `Blob` object (which `File` inherits from)
+ * @param  {*} obj
+ * @return {boolean}
+ */
+function isBlob(obj) {
+	return typeof obj === 'object' && typeof obj.arrayBuffer === 'function' && typeof obj.type === 'string' && typeof obj.stream === 'function' && typeof obj.constructor === 'function' && typeof obj.constructor.name === 'string' && /^(Blob|File)$/.test(obj.constructor.name) && /^(Blob|File)$/.test(obj[Symbol.toStringTag]);
+}
+
+/**
+ * Clone body given Res/Req instance
+ *
+ * @param   Mixed  instance  Response or Request instance
+ * @return  Mixed
+ */
+function clone(instance) {
+	let p1, p2;
+	let body = instance.body;
+
+	// don't allow cloning a used body
+	if (instance.bodyUsed) {
+		throw new Error('cannot clone body after it is used');
+	}
+
+	// check that body is a stream and not form-data object
+	// note: we can't clone the form-data object without having it as a dependency
+	if (body instanceof Stream && typeof body.getBoundary !== 'function') {
+		// tee instance body
+		p1 = new PassThrough();
+		p2 = new PassThrough();
+		body.pipe(p1);
+		body.pipe(p2);
+		// set instance body to teed body and return the other teed body
+		instance[INTERNALS].body = p1;
+		body = p2;
+	}
+
+	return body;
+}
+
+/**
+ * Performs the operation "extract a `Content-Type` value from |object|" as
+ * specified in the specification:
+ * https://fetch.spec.whatwg.org/#concept-bodyinit-extract
+ *
+ * This function assumes that instance.body is present.
+ *
+ * @param   Mixed  instance  Any options.body input
+ */
+function extractContentType(body) {
+	if (body === null) {
+		// body is null
+		return null;
+	} else if (typeof body === 'string') {
+		// body is string
+		return 'text/plain;charset=UTF-8';
+	} else if (isURLSearchParams(body)) {
+		// body is a URLSearchParams
+		return 'application/x-www-form-urlencoded;charset=UTF-8';
+	} else if (isBlob(body)) {
+		// body is blob
+		return body.type || null;
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		return null;
+	} else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
+		// body is ArrayBuffer
+		return null;
+	} else if (ArrayBuffer.isView(body)) {
+		// body is ArrayBufferView
+		return null;
+	} else if (typeof body.getBoundary === 'function') {
+		// detect form data input from form-data module
+		return `multipart/form-data;boundary=${body.getBoundary()}`;
+	} else if (body instanceof Stream) {
+		// body is stream
+		// can't really do much about this
+		return null;
+	} else {
+		// Body constructor defaults other things to string
+		return 'text/plain;charset=UTF-8';
+	}
+}
+
+/**
+ * The Fetch Standard treats this as if "total bytes" is a property on the body.
+ * For us, we have to explicitly get it with a function.
+ *
+ * ref: https://fetch.spec.whatwg.org/#concept-body-total-bytes
+ *
+ * @param   Body    instance   Instance of Body
+ * @return  Number?            Number of bytes, or null if not possible
+ */
+function getTotalBytes(instance) {
+	const body = instance.body;
+
+
+	if (body === null) {
+		// body is null
+		return 0;
+	} else if (isBlob(body)) {
+		return body.size;
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		return body.length;
+	} else if (body && typeof body.getLengthSync === 'function') {
+		// detect form data input from form-data module
+		if (body._lengthRetrievers && body._lengthRetrievers.length == 0 || // 1.x
+		body.hasKnownLength && body.hasKnownLength()) {
+			// 2.x
+			return body.getLengthSync();
+		}
+		return null;
+	} else {
+		// body is stream
+		return null;
+	}
+}
+
+/**
+ * Write a Body to a Node.js WritableStream (e.g. http.Request) object.
+ *
+ * @param   Body    instance   Instance of Body
+ * @return  Void
+ */
+function writeToStream(dest, instance) {
+	const body = instance.body;
+
+
+	if (body === null) {
+		// body is null
+		dest.end();
+	} else if (isBlob(body)) {
+		body.stream().pipe(dest);
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		dest.write(body);
+		dest.end();
+	} else {
+		// body is stream
+		body.pipe(dest);
+	}
+}
+
+// expose Promise
+Body.Promise = global.Promise;
+
+/**
+ * headers.js
+ *
+ * Headers class offers convenient helpers
+ */
+
+const invalidTokenRegex = /[^\^_`a-zA-Z\-0-9!#$%&'*+.|~]/;
+const invalidHeaderCharRegex = /[^\t\x20-\x7e\x80-\xff]/;
+
+function validateName(name) {
+	name = `${name}`;
+	if (invalidTokenRegex.test(name) || name === '') {
+		throw new TypeError(`${name} is not a legal HTTP header name`);
+	}
+}
+
+function validateValue(value) {
+	value = `${value}`;
+	if (invalidHeaderCharRegex.test(value)) {
+		throw new TypeError(`${value} is not a legal HTTP header value`);
+	}
+}
+
+/**
+ * Find the key in the map object given a header name.
+ *
+ * Returns undefined if not found.
+ *
+ * @param   String  name  Header name
+ * @return  String|Undefined
+ */
+function find(map, name) {
+	name = name.toLowerCase();
+	for (const key in map) {
+		if (key.toLowerCase() === name) {
+			return key;
+		}
+	}
+	return undefined;
+}
+
+const MAP = Symbol('map');
+class Headers {
+	/**
+  * Headers class
+  *
+  * @param   Object  headers  Response headers
+  * @return  Void
+  */
+	constructor() {
+		let init = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : undefined;
+
+		this[MAP] = Object.create(null);
+
+		if (init instanceof Headers) {
+			const rawHeaders = init.raw();
+			const headerNames = Object.keys(rawHeaders);
+
+			for (const headerName of headerNames) {
+				for (const value of rawHeaders[headerName]) {
+					this.append(headerName, value);
+				}
+			}
+
+			return;
+		}
+
+		// We don't worry about converting prop to ByteString here as append()
+		// will handle it.
+		if (init == null) ; else if (typeof init === 'object') {
+			const method = init[Symbol.iterator];
+			if (method != null) {
+				if (typeof method !== 'function') {
+					throw new TypeError('Header pairs must be iterable');
+				}
+
+				// sequence<sequence<ByteString>>
+				// Note: per spec we have to first exhaust the lists then process them
+				const pairs = [];
+				for (const pair of init) {
+					if (typeof pair !== 'object' || typeof pair[Symbol.iterator] !== 'function') {
+						throw new TypeError('Each header pair must be iterable');
+					}
+					pairs.push(Array.from(pair));
+				}
+
+				for (const pair of pairs) {
+					if (pair.length !== 2) {
+						throw new TypeError('Each header pair must be a name/value tuple');
+					}
+					this.append(pair[0], pair[1]);
+				}
+			} else {
+				// record<ByteString, ByteString>
+				for (const key of Object.keys(init)) {
+					const value = init[key];
+					this.append(key, value);
+				}
+			}
+		} else {
+			throw new TypeError('Provided initializer must be an object');
+		}
+	}
+
+	/**
+  * Return combined header value given name
+  *
+  * @param   String  name  Header name
+  * @return  Mixed
+  */
+	get(name) {
+		name = `${name}`;
+		validateName(name);
+		const key = find(this[MAP], name);
+		if (key === undefined) {
+			return null;
+		}
+
+		return this[MAP][key].join(', ');
+	}
+
+	/**
+  * Iterate over all headers
+  *
+  * @param   Function  callback  Executed for each item with parameters (value, name, thisArg)
+  * @param   Boolean   thisArg   `this` context for callback function
+  * @return  Void
+  */
+	forEach(callback) {
+		let thisArg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : undefined;
+
+		let pairs = getHeaders(this);
+		let i = 0;
+		while (i < pairs.length) {
+			var _pairs$i = pairs[i];
+			const name = _pairs$i[0],
+			      value = _pairs$i[1];
+
+			callback.call(thisArg, value, name, this);
+			pairs = getHeaders(this);
+			i++;
+		}
+	}
+
+	/**
+  * Overwrite header values given name
+  *
+  * @param   String  name   Header name
+  * @param   String  value  Header value
+  * @return  Void
+  */
+	set(name, value) {
+		name = `${name}`;
+		value = `${value}`;
+		validateName(name);
+		validateValue(value);
+		const key = find(this[MAP], name);
+		this[MAP][key !== undefined ? key : name] = [value];
+	}
+
+	/**
+  * Append a value onto existing header
+  *
+  * @param   String  name   Header name
+  * @param   String  value  Header value
+  * @return  Void
+  */
+	append(name, value) {
+		name = `${name}`;
+		value = `${value}`;
+		validateName(name);
+		validateValue(value);
+		const key = find(this[MAP], name);
+		if (key !== undefined) {
+			this[MAP][key].push(value);
+		} else {
+			this[MAP][name] = [value];
+		}
+	}
+
+	/**
+  * Check for header name existence
+  *
+  * @param   String   name  Header name
+  * @return  Boolean
+  */
+	has(name) {
+		name = `${name}`;
+		validateName(name);
+		return find(this[MAP], name) !== undefined;
+	}
+
+	/**
+  * Delete all header values given name
+  *
+  * @param   String  name  Header name
+  * @return  Void
+  */
+	delete(name) {
+		name = `${name}`;
+		validateName(name);
+		const key = find(this[MAP], name);
+		if (key !== undefined) {
+			delete this[MAP][key];
+		}
+	}
+
+	/**
+  * Return raw headers (non-spec api)
+  *
+  * @return  Object
+  */
+	raw() {
+		return this[MAP];
+	}
+
+	/**
+  * Get an iterator on keys.
+  *
+  * @return  Iterator
+  */
+	keys() {
+		return createHeadersIterator(this, 'key');
+	}
+
+	/**
+  * Get an iterator on values.
+  *
+  * @return  Iterator
+  */
+	values() {
+		return createHeadersIterator(this, 'value');
+	}
+
+	/**
+  * Get an iterator on entries.
+  *
+  * This is the default iterator of the Headers object.
+  *
+  * @return  Iterator
+  */
+	[Symbol.iterator]() {
+		return createHeadersIterator(this, 'key+value');
+	}
+}
+Headers.prototype.entries = Headers.prototype[Symbol.iterator];
+
+Object.defineProperty(Headers.prototype, Symbol.toStringTag, {
+	value: 'Headers',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+Object.defineProperties(Headers.prototype, {
+	get: { enumerable: true },
+	forEach: { enumerable: true },
+	set: { enumerable: true },
+	append: { enumerable: true },
+	has: { enumerable: true },
+	delete: { enumerable: true },
+	keys: { enumerable: true },
+	values: { enumerable: true },
+	entries: { enumerable: true }
+});
+
+function getHeaders(headers) {
+	let kind = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'key+value';
+
+	const keys = Object.keys(headers[MAP]).sort();
+	return keys.map(kind === 'key' ? function (k) {
+		return k.toLowerCase();
+	} : kind === 'value' ? function (k) {
+		return headers[MAP][k].join(', ');
+	} : function (k) {
+		return [k.toLowerCase(), headers[MAP][k].join(', ')];
+	});
+}
+
+const INTERNAL = Symbol('internal');
+
+function createHeadersIterator(target, kind) {
+	const iterator = Object.create(HeadersIteratorPrototype);
+	iterator[INTERNAL] = {
+		target,
+		kind,
+		index: 0
+	};
+	return iterator;
+}
+
+const HeadersIteratorPrototype = Object.setPrototypeOf({
+	next() {
+		// istanbul ignore if
+		if (!this || Object.getPrototypeOf(this) !== HeadersIteratorPrototype) {
+			throw new TypeError('Value of `this` is not a HeadersIterator');
+		}
+
+		var _INTERNAL = this[INTERNAL];
+		const target = _INTERNAL.target,
+		      kind = _INTERNAL.kind,
+		      index = _INTERNAL.index;
+
+		const values = getHeaders(target, kind);
+		const len = values.length;
+		if (index >= len) {
+			return {
+				value: undefined,
+				done: true
+			};
+		}
+
+		this[INTERNAL].index = index + 1;
+
+		return {
+			value: values[index],
+			done: false
+		};
+	}
+}, Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]())));
+
+Object.defineProperty(HeadersIteratorPrototype, Symbol.toStringTag, {
+	value: 'HeadersIterator',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+/**
+ * Export the Headers object in a form that Node.js can consume.
+ *
+ * @param   Headers  headers
+ * @return  Object
+ */
+function exportNodeCompatibleHeaders(headers) {
+	const obj = Object.assign({ __proto__: null }, headers[MAP]);
+
+	// http.request() only supports string as Host header. This hack makes
+	// specifying custom Host header possible.
+	const hostHeaderKey = find(headers[MAP], 'Host');
+	if (hostHeaderKey !== undefined) {
+		obj[hostHeaderKey] = obj[hostHeaderKey][0];
+	}
+
+	return obj;
+}
+
+/**
+ * Create a Headers object from an object of headers, ignoring those that do
+ * not conform to HTTP grammar productions.
+ *
+ * @param   Object  obj  Object of headers
+ * @return  Headers
+ */
+function createHeadersLenient(obj) {
+	const headers = new Headers();
+	for (const name of Object.keys(obj)) {
+		if (invalidTokenRegex.test(name)) {
+			continue;
+		}
+		if (Array.isArray(obj[name])) {
+			for (const val of obj[name]) {
+				if (invalidHeaderCharRegex.test(val)) {
+					continue;
+				}
+				if (headers[MAP][name] === undefined) {
+					headers[MAP][name] = [val];
+				} else {
+					headers[MAP][name].push(val);
+				}
+			}
+		} else if (!invalidHeaderCharRegex.test(obj[name])) {
+			headers[MAP][name] = [obj[name]];
+		}
+	}
+	return headers;
+}
+
+const INTERNALS$1 = Symbol('Response internals');
+
+// fix an issue where "STATUS_CODES" aren't a named export for node <10
+const STATUS_CODES = http.STATUS_CODES;
+
+/**
+ * Response class
+ *
+ * @param   Stream  body  Readable stream
+ * @param   Object  opts  Response options
+ * @return  Void
+ */
+class Response {
+	constructor() {
+		let body = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+		let opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+		Body.call(this, body, opts);
+
+		const status = opts.status || 200;
+		const headers = new Headers(opts.headers);
+
+		if (body != null && !headers.has('Content-Type')) {
+			const contentType = extractContentType(body);
+			if (contentType) {
+				headers.append('Content-Type', contentType);
+			}
+		}
+
+		this[INTERNALS$1] = {
+			url: opts.url,
+			status,
+			statusText: opts.statusText || STATUS_CODES[status],
+			headers,
+			counter: opts.counter
+		};
+	}
+
+	get url() {
+		return this[INTERNALS$1].url || '';
+	}
+
+	get status() {
+		return this[INTERNALS$1].status;
+	}
+
+	/**
+  * Convenience property representing if the request ended normally
+  */
+	get ok() {
+		return this[INTERNALS$1].status >= 200 && this[INTERNALS$1].status < 300;
+	}
+
+	get redirected() {
+		return this[INTERNALS$1].counter > 0;
+	}
+
+	get statusText() {
+		return this[INTERNALS$1].statusText;
+	}
+
+	get headers() {
+		return this[INTERNALS$1].headers;
+	}
+
+	/**
+  * Clone this response
+  *
+  * @return  Response
+  */
+	clone() {
+		return new Response(clone(this), {
+			url: this.url,
+			status: this.status,
+			statusText: this.statusText,
+			headers: this.headers,
+			ok: this.ok,
+			redirected: this.redirected
+		});
+	}
+}
+
+Body.mixIn(Response.prototype);
+
+Object.defineProperties(Response.prototype, {
+	url: { enumerable: true },
+	status: { enumerable: true },
+	ok: { enumerable: true },
+	redirected: { enumerable: true },
+	statusText: { enumerable: true },
+	headers: { enumerable: true },
+	clone: { enumerable: true }
+});
+
+Object.defineProperty(Response.prototype, Symbol.toStringTag, {
+	value: 'Response',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+const INTERNALS$2 = Symbol('Request internals');
+const URL = Url.URL || whatwgUrl.URL;
+
+// fix an issue where "format", "parse" aren't a named export for node <10
+const parse_url = Url.parse;
+const format_url = Url.format;
+
+/**
+ * Wrapper around `new URL` to handle arbitrary URLs
+ *
+ * @param  {string} urlStr
+ * @return {void}
+ */
+function parseURL(urlStr) {
+	/*
+ 	Check whether the URL is absolute or not
+ 		Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
+ 	Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
+ */
+	if (/^[a-zA-Z][a-zA-Z\d+\-.]*:/.exec(urlStr)) {
+		urlStr = new URL(urlStr).toString();
+	}
+
+	// Fallback to old implementation for arbitrary URLs
+	return parse_url(urlStr);
+}
+
+const streamDestructionSupported = 'destroy' in Stream.Readable.prototype;
+
+/**
+ * Check if a value is an instance of Request.
+ *
+ * @param   Mixed   input
+ * @return  Boolean
+ */
+function isRequest(input) {
+	return typeof input === 'object' && typeof input[INTERNALS$2] === 'object';
+}
+
+function isAbortSignal(signal) {
+	const proto = signal && typeof signal === 'object' && Object.getPrototypeOf(signal);
+	return !!(proto && proto.constructor.name === 'AbortSignal');
+}
+
+/**
+ * Request class
+ *
+ * @param   Mixed   input  Url or Request instance
+ * @param   Object  init   Custom options
+ * @return  Void
+ */
+class Request {
+	constructor(input) {
+		let init = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+		let parsedURL;
+
+		// normalize input
+		if (!isRequest(input)) {
+			if (input && input.href) {
+				// in order to support Node.js' Url objects; though WHATWG's URL objects
+				// will fall into this branch also (since their `toString()` will return
+				// `href` property anyway)
+				parsedURL = parseURL(input.href);
+			} else {
+				// coerce input to a string before attempting to parse
+				parsedURL = parseURL(`${input}`);
+			}
+			input = {};
+		} else {
+			parsedURL = parseURL(input.url);
+		}
+
+		let method = init.method || input.method || 'GET';
+		method = method.toUpperCase();
+
+		if ((init.body != null || isRequest(input) && input.body !== null) && (method === 'GET' || method === 'HEAD')) {
+			throw new TypeError('Request with GET/HEAD method cannot have body');
+		}
+
+		let inputBody = init.body != null ? init.body : isRequest(input) && input.body !== null ? clone(input) : null;
+
+		Body.call(this, inputBody, {
+			timeout: init.timeout || input.timeout || 0,
+			size: init.size || input.size || 0
+		});
+
+		const headers = new Headers(init.headers || input.headers || {});
+
+		if (inputBody != null && !headers.has('Content-Type')) {
+			const contentType = extractContentType(inputBody);
+			if (contentType) {
+				headers.append('Content-Type', contentType);
+			}
+		}
+
+		let signal = isRequest(input) ? input.signal : null;
+		if ('signal' in init) signal = init.signal;
+
+		if (signal != null && !isAbortSignal(signal)) {
+			throw new TypeError('Expected signal to be an instanceof AbortSignal');
+		}
+
+		this[INTERNALS$2] = {
+			method,
+			redirect: init.redirect || input.redirect || 'follow',
+			headers,
+			parsedURL,
+			signal
+		};
+
+		// node-fetch-only options
+		this.follow = init.follow !== undefined ? init.follow : input.follow !== undefined ? input.follow : 20;
+		this.compress = init.compress !== undefined ? init.compress : input.compress !== undefined ? input.compress : true;
+		this.counter = init.counter || input.counter || 0;
+		this.agent = init.agent || input.agent;
+	}
+
+	get method() {
+		return this[INTERNALS$2].method;
+	}
+
+	get url() {
+		return format_url(this[INTERNALS$2].parsedURL);
+	}
+
+	get headers() {
+		return this[INTERNALS$2].headers;
+	}
+
+	get redirect() {
+		return this[INTERNALS$2].redirect;
+	}
+
+	get signal() {
+		return this[INTERNALS$2].signal;
+	}
+
+	/**
+  * Clone this request
+  *
+  * @return  Request
+  */
+	clone() {
+		return new Request(this);
+	}
+}
+
+Body.mixIn(Request.prototype);
+
+Object.defineProperty(Request.prototype, Symbol.toStringTag, {
+	value: 'Request',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+Object.defineProperties(Request.prototype, {
+	method: { enumerable: true },
+	url: { enumerable: true },
+	headers: { enumerable: true },
+	redirect: { enumerable: true },
+	clone: { enumerable: true },
+	signal: { enumerable: true }
+});
+
+/**
+ * Convert a Request to Node.js http request options.
+ *
+ * @param   Request  A Request instance
+ * @return  Object   The options object to be passed to http.request
+ */
+function getNodeRequestOptions(request) {
+	const parsedURL = request[INTERNALS$2].parsedURL;
+	const headers = new Headers(request[INTERNALS$2].headers);
+
+	// fetch step 1.3
+	if (!headers.has('Accept')) {
+		headers.set('Accept', '*/*');
+	}
+
+	// Basic fetch
+	if (!parsedURL.protocol || !parsedURL.hostname) {
+		throw new TypeError('Only absolute URLs are supported');
+	}
+
+	if (!/^https?:$/.test(parsedURL.protocol)) {
+		throw new TypeError('Only HTTP(S) protocols are supported');
+	}
+
+	if (request.signal && request.body instanceof Stream.Readable && !streamDestructionSupported) {
+		throw new Error('Cancellation of streamed requests with AbortSignal is not supported in node < 8');
+	}
+
+	// HTTP-network-or-cache fetch steps 2.4-2.7
+	let contentLengthValue = null;
+	if (request.body == null && /^(POST|PUT)$/i.test(request.method)) {
+		contentLengthValue = '0';
+	}
+	if (request.body != null) {
+		const totalBytes = getTotalBytes(request);
+		if (typeof totalBytes === 'number') {
+			contentLengthValue = String(totalBytes);
+		}
+	}
+	if (contentLengthValue) {
+		headers.set('Content-Length', contentLengthValue);
+	}
+
+	// HTTP-network-or-cache fetch step 2.11
+	if (!headers.has('User-Agent')) {
+		headers.set('User-Agent', 'node-fetch/1.0 (+https://github.com/bitinn/node-fetch)');
+	}
+
+	// HTTP-network-or-cache fetch step 2.15
+	if (request.compress && !headers.has('Accept-Encoding')) {
+		headers.set('Accept-Encoding', 'gzip,deflate');
+	}
+
+	let agent = request.agent;
+	if (typeof agent === 'function') {
+		agent = agent(parsedURL);
+	}
+
+	if (!headers.has('Connection') && !agent) {
+		headers.set('Connection', 'close');
+	}
+
+	// HTTP-network fetch step 4.2
+	// chunked encoding is handled by Node.js
+
+	return Object.assign({}, parsedURL, {
+		method: request.method,
+		headers: exportNodeCompatibleHeaders(headers),
+		agent
+	});
+}
+
+/**
+ * abort-error.js
+ *
+ * AbortError interface for cancelled requests
+ */
+
+/**
+ * Create AbortError instance
+ *
+ * @param   String      message      Error message for human
+ * @return  AbortError
+ */
+function AbortError(message) {
+  Error.call(this, message);
+
+  this.type = 'aborted';
+  this.message = message;
+
+  // hide custom error implementation details from end-users
+  Error.captureStackTrace(this, this.constructor);
+}
+
+AbortError.prototype = Object.create(Error.prototype);
+AbortError.prototype.constructor = AbortError;
+AbortError.prototype.name = 'AbortError';
+
+const URL$1 = Url.URL || whatwgUrl.URL;
+
+// fix an issue where "PassThrough", "resolve" aren't a named export for node <10
+const PassThrough$1 = Stream.PassThrough;
+
+const isDomainOrSubdomain = function isDomainOrSubdomain(destination, original) {
+	const orig = new URL$1(original).hostname;
+	const dest = new URL$1(destination).hostname;
+
+	return orig === dest || orig[orig.length - dest.length - 1] === '.' && orig.endsWith(dest);
+};
+
+/**
+ * Fetch function
+ *
+ * @param   Mixed    url   Absolute url or Request instance
+ * @param   Object   opts  Fetch options
+ * @return  Promise
+ */
+function fetch(url, opts) {
+
+	// allow custom promise
+	if (!fetch.Promise) {
+		throw new Error('native promise missing, set fetch.Promise to your favorite alternative');
+	}
+
+	Body.Promise = fetch.Promise;
+
+	// wrap http.request into fetch
+	return new fetch.Promise(function (resolve, reject) {
+		// build request object
+		const request = new Request(url, opts);
+		const options = getNodeRequestOptions(request);
+
+		const send = (options.protocol === 'https:' ? https : http).request;
+		const signal = request.signal;
+
+		let response = null;
+
+		const abort = function abort() {
+			let error = new AbortError('The user aborted a request.');
+			reject(error);
+			if (request.body && request.body instanceof Stream.Readable) {
+				request.body.destroy(error);
+			}
+			if (!response || !response.body) return;
+			response.body.emit('error', error);
+		};
+
+		if (signal && signal.aborted) {
+			abort();
+			return;
+		}
+
+		const abortAndFinalize = function abortAndFinalize() {
+			abort();
+			finalize();
+		};
+
+		// send request
+		const req = send(options);
+		let reqTimeout;
+
+		if (signal) {
+			signal.addEventListener('abort', abortAndFinalize);
+		}
+
+		function finalize() {
+			req.abort();
+			if (signal) signal.removeEventListener('abort', abortAndFinalize);
+			clearTimeout(reqTimeout);
+		}
+
+		if (request.timeout) {
+			req.once('socket', function (socket) {
+				reqTimeout = setTimeout(function () {
+					reject(new FetchError(`network timeout at: ${request.url}`, 'request-timeout'));
+					finalize();
+				}, request.timeout);
+			});
+		}
+
+		req.on('error', function (err) {
+			reject(new FetchError(`request to ${request.url} failed, reason: ${err.message}`, 'system', err));
+			finalize();
+		});
+
+		req.on('response', function (res) {
+			clearTimeout(reqTimeout);
+
+			const headers = createHeadersLenient(res.headers);
+
+			// HTTP fetch step 5
+			if (fetch.isRedirect(res.statusCode)) {
+				// HTTP fetch step 5.2
+				const location = headers.get('Location');
+
+				// HTTP fetch step 5.3
+				let locationURL = null;
+				try {
+					locationURL = location === null ? null : new URL$1(location, request.url).toString();
+				} catch (err) {
+					// error here can only be invalid URL in Location: header
+					// do not throw when options.redirect == manual
+					// let the user extract the errorneous redirect URL
+					if (request.redirect !== 'manual') {
+						reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect'));
+						finalize();
+						return;
+					}
+				}
+
+				// HTTP fetch step 5.5
+				switch (request.redirect) {
+					case 'error':
+						reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect'));
+						finalize();
+						return;
+					case 'manual':
+						// node-fetch-specific step: make manual redirect a bit easier to use by setting the Location header value to the resolved URL.
+						if (locationURL !== null) {
+							// handle corrupted header
+							try {
+								headers.set('Location', locationURL);
+							} catch (err) {
+								// istanbul ignore next: nodejs server prevent invalid response headers, we can't test this through normal request
+								reject(err);
+							}
+						}
+						break;
+					case 'follow':
+						// HTTP-redirect fetch step 2
+						if (locationURL === null) {
+							break;
+						}
+
+						// HTTP-redirect fetch step 5
+						if (request.counter >= request.follow) {
+							reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect'));
+							finalize();
+							return;
+						}
+
+						// HTTP-redirect fetch step 6 (counter increment)
+						// Create a new Request object.
+						const requestOpts = {
+							headers: new Headers(request.headers),
+							follow: request.follow,
+							counter: request.counter + 1,
+							agent: request.agent,
+							compress: request.compress,
+							method: request.method,
+							body: request.body,
+							signal: request.signal,
+							timeout: request.timeout,
+							size: request.size
+						};
+
+						if (!isDomainOrSubdomain(request.url, locationURL)) {
+							for (const name of ['authorization', 'www-authenticate', 'cookie', 'cookie2']) {
+								requestOpts.headers.delete(name);
+							}
+						}
+
+						// HTTP-redirect fetch step 9
+						if (res.statusCode !== 303 && request.body && getTotalBytes(request) === null) {
+							reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect'));
+							finalize();
+							return;
+						}
+
+						// HTTP-redirect fetch step 11
+						if (res.statusCode === 303 || (res.statusCode === 301 || res.statusCode === 302) && request.method === 'POST') {
+							requestOpts.method = 'GET';
+							requestOpts.body = undefined;
+							requestOpts.headers.delete('content-length');
+						}
+
+						// HTTP-redirect fetch step 15
+						resolve(fetch(new Request(locationURL, requestOpts)));
+						finalize();
+						return;
+				}
+			}
+
+			// prepare response
+			res.once('end', function () {
+				if (signal) signal.removeEventListener('abort', abortAndFinalize);
+			});
+			let body = res.pipe(new PassThrough$1());
+
+			const response_options = {
+				url: request.url,
+				status: res.statusCode,
+				statusText: res.statusMessage,
+				headers: headers,
+				size: request.size,
+				timeout: request.timeout,
+				counter: request.counter
+			};
+
+			// HTTP-network fetch step 12.1.1.3
+			const codings = headers.get('Content-Encoding');
+
+			// HTTP-network fetch step 12.1.1.4: handle content codings
+
+			// in following scenarios we ignore compression support
+			// 1. compression support is disabled
+			// 2. HEAD request
+			// 3. no Content-Encoding header
+			// 4. no content response (204)
+			// 5. content not modified response (304)
+			if (!request.compress || request.method === 'HEAD' || codings === null || res.statusCode === 204 || res.statusCode === 304) {
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// For Node v6+
+			// Be less strict when decoding compressed responses, since sometimes
+			// servers send slightly invalid responses that are still accepted
+			// by common browsers.
+			// Always using Z_SYNC_FLUSH is what cURL does.
+			const zlibOptions = {
+				flush: zlib.Z_SYNC_FLUSH,
+				finishFlush: zlib.Z_SYNC_FLUSH
+			};
+
+			// for gzip
+			if (codings == 'gzip' || codings == 'x-gzip') {
+				body = body.pipe(zlib.createGunzip(zlibOptions));
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// for deflate
+			if (codings == 'deflate' || codings == 'x-deflate') {
+				// handle the infamous raw deflate response from old servers
+				// a hack for old IIS and Apache servers
+				const raw = res.pipe(new PassThrough$1());
+				raw.once('data', function (chunk) {
+					// see http://stackoverflow.com/questions/37519828
+					if ((chunk[0] & 0x0F) === 0x08) {
+						body = body.pipe(zlib.createInflate());
+					} else {
+						body = body.pipe(zlib.createInflateRaw());
+					}
+					response = new Response(body, response_options);
+					resolve(response);
+				});
+				return;
+			}
+
+			// for br
+			if (codings == 'br' && typeof zlib.createBrotliDecompress === 'function') {
+				body = body.pipe(zlib.createBrotliDecompress());
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// otherwise, use response as-is
+			response = new Response(body, response_options);
+			resolve(response);
+		});
+
+		writeToStream(req, request);
+	});
+}
+/**
+ * Redirect code matching
+ *
+ * @param   Number   code  Status code
+ * @return  Boolean
+ */
+fetch.isRedirect = function (code) {
+	return code === 301 || code === 302 || code === 303 || code === 307 || code === 308;
+};
+
+// expose Promise
+fetch.Promise = global.Promise;
+
+export default fetch;
+export { Headers, Request, Response, FetchError };

+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
+
+var Stream = _interopDefault(require('stream'));
+var http = _interopDefault(require('http'));
+var Url = _interopDefault(require('url'));
+var whatwgUrl = _interopDefault(require('whatwg-url'));
+var https = _interopDefault(require('https'));
+var zlib = _interopDefault(require('zlib'));
+
+// Based on https://github.com/tmpvar/jsdom/blob/aa85b2abf07766ff7bf5c1f6daafb3726f2f2db5/lib/jsdom/living/blob.js
+
+// fix for "Readable" isn't a named export issue
+const Readable = Stream.Readable;
+
+const BUFFER = Symbol('buffer');
+const TYPE = Symbol('type');
+
+class Blob {
+	constructor() {
+		this[TYPE] = '';
+
+		const blobParts = arguments[0];
+		const options = arguments[1];
+
+		const buffers = [];
+		let size = 0;
+
+		if (blobParts) {
+			const a = blobParts;
+			const length = Number(a.length);
+			for (let i = 0; i < length; i++) {
+				const element = a[i];
+				let buffer;
+				if (element instanceof Buffer) {
+					buffer = element;
+				} else if (ArrayBuffer.isView(element)) {
+					buffer = Buffer.from(element.buffer, element.byteOffset, element.byteLength);
+				} else if (element instanceof ArrayBuffer) {
+					buffer = Buffer.from(element);
+				} else if (element instanceof Blob) {
+					buffer = element[BUFFER];
+				} else {
+					buffer = Buffer.from(typeof element === 'string' ? element : String(element));
+				}
+				size += buffer.length;
+				buffers.push(buffer);
+			}
+		}
+
+		this[BUFFER] = Buffer.concat(buffers);
+
+		let type = options && options.type !== undefined && String(options.type).toLowerCase();
+		if (type && !/[^\u0020-\u007E]/.test(type)) {
+			this[TYPE] = type;
+		}
+	}
+	get size() {
+		return this[BUFFER].length;
+	}
+	get type() {
+		return this[TYPE];
+	}
+	text() {
+		return Promise.resolve(this[BUFFER].toString());
+	}
+	arrayBuffer() {
+		const buf = this[BUFFER];
+		const ab = buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		return Promise.resolve(ab);
+	}
+	stream() {
+		const readable = new Readable();
+		readable._read = function () {};
+		readable.push(this[BUFFER]);
+		readable.push(null);
+		return readable;
+	}
+	toString() {
+		return '[object Blob]';
+	}
+	slice() {
+		const size = this.size;
+
+		const start = arguments[0];
+		const end = arguments[1];
+		let relativeStart, relativeEnd;
+		if (start === undefined) {
+			relativeStart = 0;
+		} else if (start < 0) {
+			relativeStart = Math.max(size + start, 0);
+		} else {
+			relativeStart = Math.min(start, size);
+		}
+		if (end === undefined) {
+			relativeEnd = size;
+		} else if (end < 0) {
+			relativeEnd = Math.max(size + end, 0);
+		} else {
+			relativeEnd = Math.min(end, size);
+		}
+		const span = Math.max(relativeEnd - relativeStart, 0);
+
+		const buffer = this[BUFFER];
+		const slicedBuffer = buffer.slice(relativeStart, relativeStart + span);
+		const blob = new Blob([], { type: arguments[2] });
+		blob[BUFFER] = slicedBuffer;
+		return blob;
+	}
+}
+
+Object.defineProperties(Blob.prototype, {
+	size: { enumerable: true },
+	type: { enumerable: true },
+	slice: { enumerable: true }
+});
+
+Object.defineProperty(Blob.prototype, Symbol.toStringTag, {
+	value: 'Blob',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+/**
+ * fetch-error.js
+ *
+ * FetchError interface for operational errors
+ */
+
+/**
+ * Create FetchError instance
+ *
+ * @param   String      message      Error message for human
+ * @param   String      type         Error type for machine
+ * @param   String      systemError  For Node.js system error
+ * @return  FetchError
+ */
+function FetchError(message, type, systemError) {
+  Error.call(this, message);
+
+  this.message = message;
+  this.type = type;
+
+  // when err.type is `system`, err.code contains system error code
+  if (systemError) {
+    this.code = this.errno = systemError.code;
+  }
+
+  // hide custom error implementation details from end-users
+  Error.captureStackTrace(this, this.constructor);
+}
+
+FetchError.prototype = Object.create(Error.prototype);
+FetchError.prototype.constructor = FetchError;
+FetchError.prototype.name = 'FetchError';
+
+let convert;
+try {
+	convert = require('encoding').convert;
+} catch (e) {}
+
+const INTERNALS = Symbol('Body internals');
+
+// fix an issue where "PassThrough" isn't a named export for node <10
+const PassThrough = Stream.PassThrough;
+
+/**
+ * Body mixin
+ *
+ * Ref: https://fetch.spec.whatwg.org/#body
+ *
+ * @param   Stream  body  Readable stream
+ * @param   Object  opts  Response options
+ * @return  Void
+ */
+function Body(body) {
+	var _this = this;
+
+	var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
+	    _ref$size = _ref.size;
+
+	let size = _ref$size === undefined ? 0 : _ref$size;
+	var _ref$timeout = _ref.timeout;
+	let timeout = _ref$timeout === undefined ? 0 : _ref$timeout;
+
+	if (body == null) {
+		// body is undefined or null
+		body = null;
+	} else if (isURLSearchParams(body)) {
+		// body is a URLSearchParams
+		body = Buffer.from(body.toString());
+	} else if (isBlob(body)) ; else if (Buffer.isBuffer(body)) ; else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
+		// body is ArrayBuffer
+		body = Buffer.from(body);
+	} else if (ArrayBuffer.isView(body)) {
+		// body is ArrayBufferView
+		body = Buffer.from(body.buffer, body.byteOffset, body.byteLength);
+	} else if (body instanceof Stream) ; else {
+		// none of the above
+		// coerce to string then buffer
+		body = Buffer.from(String(body));
+	}
+	this[INTERNALS] = {
+		body,
+		disturbed: false,
+		error: null
+	};
+	this.size = size;
+	this.timeout = timeout;
+
+	if (body instanceof Stream) {
+		body.on('error', function (err) {
+			const error = err.name === 'AbortError' ? err : new FetchError(`Invalid response body while trying to fetch ${_this.url}: ${err.message}`, 'system', err);
+			_this[INTERNALS].error = error;
+		});
+	}
+}
+
+Body.prototype = {
+	get body() {
+		return this[INTERNALS].body;
+	},
+
+	get bodyUsed() {
+		return this[INTERNALS].disturbed;
+	},
+
+	/**
+  * Decode response as ArrayBuffer
+  *
+  * @return  Promise
+  */
+	arrayBuffer() {
+		return consumeBody.call(this).then(function (buf) {
+			return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		});
+	},
+
+	/**
+  * Return raw response as Blob
+  *
+  * @return Promise
+  */
+	blob() {
+		let ct = this.headers && this.headers.get('content-type') || '';
+		return consumeBody.call(this).then(function (buf) {
+			return Object.assign(
+			// Prevent copying
+			new Blob([], {
+				type: ct.toLowerCase()
+			}), {
+				[BUFFER]: buf
+			});
+		});
+	},
+
+	/**
+  * Decode response as json
+  *
+  * @return  Promise
+  */
+	json() {
+		var _this2 = this;
+
+		return consumeBody.call(this).then(function (buffer) {
+			try {
+				return JSON.parse(buffer.toString());
+			} catch (err) {
+				return Body.Promise.reject(new FetchError(`invalid json response body at ${_this2.url} reason: ${err.message}`, 'invalid-json'));
+			}
+		});
+	},
+
+	/**
+  * Decode response as text
+  *
+  * @return  Promise
+  */
+	text() {
+		return consumeBody.call(this).then(function (buffer) {
+			return buffer.toString();
+		});
+	},
+
+	/**
+  * Decode response as buffer (non-spec api)
+  *
+  * @return  Promise
+  */
+	buffer() {
+		return consumeBody.call(this);
+	},
+
+	/**
+  * Decode response as text, while automatically detecting the encoding and
+  * trying to decode to UTF-8 (non-spec api)
+  *
+  * @return  Promise
+  */
+	textConverted() {
+		var _this3 = this;
+
+		return consumeBody.call(this).then(function (buffer) {
+			return convertBody(buffer, _this3.headers);
+		});
+	}
+};
+
+// In browsers, all properties are enumerable.
+Object.defineProperties(Body.prototype, {
+	body: { enumerable: true },
+	bodyUsed: { enumerable: true },
+	arrayBuffer: { enumerable: true },
+	blob: { enumerable: true },
+	json: { enumerable: true },
+	text: { enumerable: true }
+});
+
+Body.mixIn = function (proto) {
+	for (const name of Object.getOwnPropertyNames(Body.prototype)) {
+		// istanbul ignore else: future proof
+		if (!(name in proto)) {
+			const desc = Object.getOwnPropertyDescriptor(Body.prototype, name);
+			Object.defineProperty(proto, name, desc);
+		}
+	}
+};
+
+/**
+ * Consume and convert an entire Body to a Buffer.
+ *
+ * Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body
+ *
+ * @return  Promise
+ */
+function consumeBody() {
+	var _this4 = this;
+
+	if (this[INTERNALS].disturbed) {
+		return Body.Promise.reject(new TypeError(`body used already for: ${this.url}`));
+	}
+
+	this[INTERNALS].disturbed = true;
+
+	if (this[INTERNALS].error) {
+		return Body.Promise.reject(this[INTERNALS].error);
+	}
+
+	let body = this.body;
+
+	// body is null
+	if (body === null) {
+		return Body.Promise.resolve(Buffer.alloc(0));
+	}
+
+	// body is blob
+	if (isBlob(body)) {
+		body = body.stream();
+	}
+
+	// body is buffer
+	if (Buffer.isBuffer(body)) {
+		return Body.Promise.resolve(body);
+	}
+
+	// istanbul ignore if: should never happen
+	if (!(body instanceof Stream)) {
+		return Body.Promise.resolve(Buffer.alloc(0));
+	}
+
+	// body is stream
+	// get ready to actually consume the body
+	let accum = [];
+	let accumBytes = 0;
+	let abort = false;
+
+	return new Body.Promise(function (resolve, reject) {
+		let resTimeout;
+
+		// allow timeout on slow response body
+		if (_this4.timeout) {
+			resTimeout = setTimeout(function () {
+				abort = true;
+				reject(new FetchError(`Response timeout while trying to fetch ${_this4.url} (over ${_this4.timeout}ms)`, 'body-timeout'));
+			}, _this4.timeout);
+		}
+
+		// handle stream errors
+		body.on('error', function (err) {
+			if (err.name === 'AbortError') {
+				// if the request was aborted, reject with this Error
+				abort = true;
+				reject(err);
+			} else {
+				// other errors, such as incorrect content-encoding
+				reject(new FetchError(`Invalid response body while trying to fetch ${_this4.url}: ${err.message}`, 'system', err));
+			}
+		});
+
+		body.on('data', function (chunk) {
+			if (abort || chunk === null) {
+				return;
+			}
+
+			if (_this4.size && accumBytes + chunk.length > _this4.size) {
+				abort = true;
+				reject(new FetchError(`content size at ${_this4.url} over limit: ${_this4.size}`, 'max-size'));
+				return;
+			}
+
+			accumBytes += chunk.length;
+			accum.push(chunk);
+		});
+
+		body.on('end', function () {
+			if (abort) {
+				return;
+			}
+
+			clearTimeout(resTimeout);
+
+			try {
+				resolve(Buffer.concat(accum, accumBytes));
+			} catch (err) {
+				// handle streams that have accumulated too much data (issue #414)
+				reject(new FetchError(`Could not create Buffer from response body for ${_this4.url}: ${err.message}`, 'system', err));
+			}
+		});
+	});
+}
+
+/**
+ * Detect buffer encoding and convert to target encoding
+ * ref: http://www.w3.org/TR/2011/WD-html5-20110113/parsing.html#determining-the-character-encoding
+ *
+ * @param   Buffer  buffer    Incoming buffer
+ * @param   String  encoding  Target encoding
+ * @return  String
+ */
+function convertBody(buffer, headers) {
+	if (typeof convert !== 'function') {
+		throw new Error('The package `encoding` must be installed to use the textConverted() function');
+	}
+
+	const ct = headers.get('content-type');
+	let charset = 'utf-8';
+	let res, str;
+
+	// header
+	if (ct) {
+		res = /charset=([^;]*)/i.exec(ct);
+	}
+
+	// no charset in content type, peek at response body for at most 1024 bytes
+	str = buffer.slice(0, 1024).toString();
+
+	// html5
+	if (!res && str) {
+		res = /<meta.+?charset=(['"])(.+?)\1/i.exec(str);
+	}
+
+	// html4
+	if (!res && str) {
+		res = /<meta[\s]+?http-equiv=(['"])content-type\1[\s]+?content=(['"])(.+?)\2/i.exec(str);
+		if (!res) {
+			res = /<meta[\s]+?content=(['"])(.+?)\1[\s]+?http-equiv=(['"])content-type\3/i.exec(str);
+			if (res) {
+				res.pop(); // drop last quote
+			}
+		}
+
+		if (res) {
+			res = /charset=(.*)/i.exec(res.pop());
+		}
+	}
+
+	// xml
+	if (!res && str) {
+		res = /<\?xml.+?encoding=(['"])(.+?)\1/i.exec(str);
+	}
+
+	// found charset
+	if (res) {
+		charset = res.pop();
+
+		// prevent decode issues when sites use incorrect encoding
+		// ref: https://hsivonen.fi/encoding-menu/
+		if (charset === 'gb2312' || charset === 'gbk') {
+			charset = 'gb18030';
+		}
+	}
+
+	// turn raw buffers into a single utf-8 buffer
+	return convert(buffer, 'UTF-8', charset).toString();
+}
+
+/**
+ * Detect a URLSearchParams object
+ * ref: https://github.com/bitinn/node-fetch/issues/296#issuecomment-307598143
+ *
+ * @param   Object  obj     Object to detect by type or brand
+ * @return  String
+ */
+function isURLSearchParams(obj) {
+	// Duck-typing as a necessary condition.
+	if (typeof obj !== 'object' || typeof obj.append !== 'function' || typeof obj.delete !== 'function' || typeof obj.get !== 'function' || typeof obj.getAll !== 'function' || typeof obj.has !== 'function' || typeof obj.set !== 'function') {
+		return false;
+	}
+
+	// Brand-checking and more duck-typing as optional condition.
+	return obj.constructor.name === 'URLSearchParams' || Object.prototype.toString.call(obj) === '[object URLSearchParams]' || typeof obj.sort === 'function';
+}
+
+/**
+ * Check if `obj` is a W3C `Blob` object (which `File` inherits from)
+ * @param  {*} obj
+ * @return {boolean}
+ */
+function isBlob(obj) {
+	return typeof obj === 'object' && typeof obj.arrayBuffer === 'function' && typeof obj.type === 'string' && typeof obj.stream === 'function' && typeof obj.constructor === 'function' && typeof obj.constructor.name === 'string' && /^(Blob|File)$/.test(obj.constructor.name) && /^(Blob|File)$/.test(obj[Symbol.toStringTag]);
+}
+
+/**
+ * Clone body given Res/Req instance
+ *
+ * @param   Mixed  instance  Response or Request instance
+ * @return  Mixed
+ */
+function clone(instance) {
+	let p1, p2;
+	let body = instance.body;
+
+	// don't allow cloning a used body
+	if (instance.bodyUsed) {
+		throw new Error('cannot clone body after it is used');
+	}
+
+	// check that body is a stream and not form-data object
+	// note: we can't clone the form-data object without having it as a dependency
+	if (body instanceof Stream && typeof body.getBoundary !== 'function') {
+		// tee instance body
+		p1 = new PassThrough();
+		p2 = new PassThrough();
+		body.pipe(p1);
+		body.pipe(p2);
+		// set instance body to teed body and return the other teed body
+		instance[INTERNALS].body = p1;
+		body = p2;
+	}
+
+	return body;
+}
+
+/**
+ * Performs the operation "extract a `Content-Type` value from |object|" as
+ * specified in the specification:
+ * https://fetch.spec.whatwg.org/#concept-bodyinit-extract
+ *
+ * This function assumes that instance.body is present.
+ *
+ * @param   Mixed  instance  Any options.body input
+ */
+function extractContentType(body) {
+	if (body === null) {
+		// body is null
+		return null;
+	} else if (typeof body === 'string') {
+		// body is string
+		return 'text/plain;charset=UTF-8';
+	} else if (isURLSearchParams(body)) {
+		// body is a URLSearchParams
+		return 'application/x-www-form-urlencoded;charset=UTF-8';
+	} else if (isBlob(body)) {
+		// body is blob
+		return body.type || null;
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		return null;
+	} else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
+		// body is ArrayBuffer
+		return null;
+	} else if (ArrayBuffer.isView(body)) {
+		// body is ArrayBufferView
+		return null;
+	} else if (typeof body.getBoundary === 'function') {
+		// detect form data input from form-data module
+		return `multipart/form-data;boundary=${body.getBoundary()}`;
+	} else if (body instanceof Stream) {
+		// body is stream
+		// can't really do much about this
+		return null;
+	} else {
+		// Body constructor defaults other things to string
+		return 'text/plain;charset=UTF-8';
+	}
+}
+
+/**
+ * The Fetch Standard treats this as if "total bytes" is a property on the body.
+ * For us, we have to explicitly get it with a function.
+ *
+ * ref: https://fetch.spec.whatwg.org/#concept-body-total-bytes
+ *
+ * @param   Body    instance   Instance of Body
+ * @return  Number?            Number of bytes, or null if not possible
+ */
+function getTotalBytes(instance) {
+	const body = instance.body;
+
+
+	if (body === null) {
+		// body is null
+		return 0;
+	} else if (isBlob(body)) {
+		return body.size;
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		return body.length;
+	} else if (body && typeof body.getLengthSync === 'function') {
+		// detect form data input from form-data module
+		if (body._lengthRetrievers && body._lengthRetrievers.length == 0 || // 1.x
+		body.hasKnownLength && body.hasKnownLength()) {
+			// 2.x
+			return body.getLengthSync();
+		}
+		return null;
+	} else {
+		// body is stream
+		return null;
+	}
+}
+
+/**
+ * Write a Body to a Node.js WritableStream (e.g. http.Request) object.
+ *
+ * @param   Body    instance   Instance of Body
+ * @return  Void
+ */
+function writeToStream(dest, instance) {
+	const body = instance.body;
+
+
+	if (body === null) {
+		// body is null
+		dest.end();
+	} else if (isBlob(body)) {
+		body.stream().pipe(dest);
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		dest.write(body);
+		dest.end();
+	} else {
+		// body is stream
+		body.pipe(dest);
+	}
+}
+
+// expose Promise
+Body.Promise = global.Promise;
+
+/**
+ * headers.js
+ *
+ * Headers class offers convenient helpers
+ */
+
+const invalidTokenRegex = /[^\^_`a-zA-Z\-0-9!#$%&'*+.|~]/;
+const invalidHeaderCharRegex = /[^\t\x20-\x7e\x80-\xff]/;
+
+function validateName(name) {
+	name = `${name}`;
+	if (invalidTokenRegex.test(name) || name === '') {
+		throw new TypeError(`${name} is not a legal HTTP header name`);
+	}
+}
+
+function validateValue(value) {
+	value = `${value}`;
+	if (invalidHeaderCharRegex.test(value)) {
+		throw new TypeError(`${value} is not a legal HTTP header value`);
+	}
+}
+
+/**
+ * Find the key in the map object given a header name.
+ *
+ * Returns undefined if not found.
+ *
+ * @param   String  name  Header name
+ * @return  String|Undefined
+ */
+function find(map, name) {
+	name = name.toLowerCase();
+	for (const key in map) {
+		if (key.toLowerCase() === name) {
+			return key;
+		}
+	}
+	return undefined;
+}
+
+const MAP = Symbol('map');
+class Headers {
+	/**
+  * Headers class
+  *
+  * @param   Object  headers  Response headers
+  * @return  Void
+  */
+	constructor() {
+		let init = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : undefined;
+
+		this[MAP] = Object.create(null);
+
+		if (init instanceof Headers) {
+			const rawHeaders = init.raw();
+			const headerNames = Object.keys(rawHeaders);
+
+			for (const headerName of headerNames) {
+				for (const value of rawHeaders[headerName]) {
+					this.append(headerName, value);
+				}
+			}
+
+			return;
+		}
+
+		// We don't worry about converting prop to ByteString here as append()
+		// will handle it.
+		if (init == null) ; else if (typeof init === 'object') {
+			const method = init[Symbol.iterator];
+			if (method != null) {
+				if (typeof method !== 'function') {
+					throw new TypeError('Header pairs must be iterable');
+				}
+
+				// sequence<sequence<ByteString>>
+				// Note: per spec we have to first exhaust the lists then process them
+				const pairs = [];
+				for (const pair of init) {
+					if (typeof pair !== 'object' || typeof pair[Symbol.iterator] !== 'function') {
+						throw new TypeError('Each header pair must be iterable');
+					}
+					pairs.push(Array.from(pair));
+				}
+
+				for (const pair of pairs) {
+					if (pair.length !== 2) {
+						throw new TypeError('Each header pair must be a name/value tuple');
+					}
+					this.append(pair[0], pair[1]);
+				}
+			} else {
+				// record<ByteString, ByteString>
+				for (const key of Object.keys(init)) {
+					const value = init[key];
+					this.append(key, value);
+				}
+			}
+		} else {
+			throw new TypeError('Provided initializer must be an object');
+		}
+	}
+
+	/**
+  * Return combined header value given name
+  *
+  * @param   String  name  Header name
+  * @return  Mixed
+  */
+	get(name) {
+		name = `${name}`;
+		validateName(name);
+		const key = find(this[MAP], name);
+		if (key === undefined) {
+			return null;
+		}
+
+		return this[MAP][key].join(', ');
+	}
+
+	/**
+  * Iterate over all headers
+  *
+  * @param   Function  callback  Executed for each item with parameters (value, name, thisArg)
+  * @param   Boolean   thisArg   `this` context for callback function
+  * @return  Void
+  */
+	forEach(callback) {
+		let thisArg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : undefined;
+
+		let pairs = getHeaders(this);
+		let i = 0;
+		while (i < pairs.length) {
+			var _pairs$i = pairs[i];
+			const name = _pairs$i[0],
+			      value = _pairs$i[1];
+
+			callback.call(thisArg, value, name, this);
+			pairs = getHeaders(this);
+			i++;
+		}
+	}
+
+	/**
+  * Overwrite header values given name
+  *
+  * @param   String  name   Header name
+  * @param   String  value  Header value
+  * @return  Void
+  */
+	set(name, value) {
+		name = `${name}`;
+		value = `${value}`;
+		validateName(name);
+		validateValue(value);
+		const key = find(this[MAP], name);
+		this[MAP][key !== undefined ? key : name] = [value];
+	}
+
+	/**
+  * Append a value onto existing header
+  *
+  * @param   String  name   Header name
+  * @param   String  value  Header value
+  * @return  Void
+  */
+	append(name, value) {
+		name = `${name}`;
+		value = `${value}`;
+		validateName(name);
+		validateValue(value);
+		const key = find(this[MAP], name);
+		if (key !== undefined) {
+			this[MAP][key].push(value);
+		} else {
+			this[MAP][name] = [value];
+		}
+	}
+
+	/**
+  * Check for header name existence
+  *
+  * @param   String   name  Header name
+  * @return  Boolean
+  */
+	has(name) {
+		name = `${name}`;
+		validateName(name);
+		return find(this[MAP], name) !== undefined;
+	}
+
+	/**
+  * Delete all header values given name
+  *
+  * @param   String  name  Header name
+  * @return  Void
+  */
+	delete(name) {
+		name = `${name}`;
+		validateName(name);
+		const key = find(this[MAP], name);
+		if (key !== undefined) {
+			delete this[MAP][key];
+		}
+	}
+
+	/**
+  * Return raw headers (non-spec api)
+  *
+  * @return  Object
+  */
+	raw() {
+		return this[MAP];
+	}
+
+	/**
+  * Get an iterator on keys.
+  *
+  * @return  Iterator
+  */
+	keys() {
+		return createHeadersIterator(this, 'key');
+	}
+
+	/**
+  * Get an iterator on values.
+  *
+  * @return  Iterator
+  */
+	values() {
+		return createHeadersIterator(this, 'value');
+	}
+
+	/**
+  * Get an iterator on entries.
+  *
+  * This is the default iterator of the Headers object.
+  *
+  * @return  Iterator
+  */
+	[Symbol.iterator]() {
+		return createHeadersIterator(this, 'key+value');
+	}
+}
+Headers.prototype.entries = Headers.prototype[Symbol.iterator];
+
+Object.defineProperty(Headers.prototype, Symbol.toStringTag, {
+	value: 'Headers',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+Object.defineProperties(Headers.prototype, {
+	get: { enumerable: true },
+	forEach: { enumerable: true },
+	set: { enumerable: true },
+	append: { enumerable: true },
+	has: { enumerable: true },
+	delete: { enumerable: true },
+	keys: { enumerable: true },
+	values: { enumerable: true },
+	entries: { enumerable: true }
+});
+
+function getHeaders(headers) {
+	let kind = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'key+value';
+
+	const keys = Object.keys(headers[MAP]).sort();
+	return keys.map(kind === 'key' ? function (k) {
+		return k.toLowerCase();
+	} : kind === 'value' ? function (k) {
+		return headers[MAP][k].join(', ');
+	} : function (k) {
+		return [k.toLowerCase(), headers[MAP][k].join(', ')];
+	});
+}
+
+const INTERNAL = Symbol('internal');
+
+function createHeadersIterator(target, kind) {
+	const iterator = Object.create(HeadersIteratorPrototype);
+	iterator[INTERNAL] = {
+		target,
+		kind,
+		index: 0
+	};
+	return iterator;
+}
+
+const HeadersIteratorPrototype = Object.setPrototypeOf({
+	next() {
+		// istanbul ignore if
+		if (!this || Object.getPrototypeOf(this) !== HeadersIteratorPrototype) {
+			throw new TypeError('Value of `this` is not a HeadersIterator');
+		}
+
+		var _INTERNAL = this[INTERNAL];
+		const target = _INTERNAL.target,
+		      kind = _INTERNAL.kind,
+		      index = _INTERNAL.index;
+
+		const values = getHeaders(target, kind);
+		const len = values.length;
+		if (index >= len) {
+			return {
+				value: undefined,
+				done: true
+			};
+		}
+
+		this[INTERNAL].index = index + 1;
+
+		return {
+			value: values[index],
+			done: false
+		};
+	}
+}, Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]())));
+
+Object.defineProperty(HeadersIteratorPrototype, Symbol.toStringTag, {
+	value: 'HeadersIterator',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+/**
+ * Export the Headers object in a form that Node.js can consume.
+ *
+ * @param   Headers  headers
+ * @return  Object
+ */
+function exportNodeCompatibleHeaders(headers) {
+	const obj = Object.assign({ __proto__: null }, headers[MAP]);
+
+	// http.request() only supports string as Host header. This hack makes
+	// specifying custom Host header possible.
+	const hostHeaderKey = find(headers[MAP], 'Host');
+	if (hostHeaderKey !== undefined) {
+		obj[hostHeaderKey] = obj[hostHeaderKey][0];
+	}
+
+	return obj;
+}
+
+/**
+ * Create a Headers object from an object of headers, ignoring those that do
+ * not conform to HTTP grammar productions.
+ *
+ * @param   Object  obj  Object of headers
+ * @return  Headers
+ */
+function createHeadersLenient(obj) {
+	const headers = new Headers();
+	for (const name of Object.keys(obj)) {
+		if (invalidTokenRegex.test(name)) {
+			continue;
+		}
+		if (Array.isArray(obj[name])) {
+			for (const val of obj[name]) {
+				if (invalidHeaderCharRegex.test(val)) {
+					continue;
+				}
+				if (headers[MAP][name] === undefined) {
+					headers[MAP][name] = [val];
+				} else {
+					headers[MAP][name].push(val);
+				}
+			}
+		} else if (!invalidHeaderCharRegex.test(obj[name])) {
+			headers[MAP][name] = [obj[name]];
+		}
+	}
+	return headers;
+}
+
+const INTERNALS$1 = Symbol('Response internals');
+
+// fix an issue where "STATUS_CODES" aren't a named export for node <10
+const STATUS_CODES = http.STATUS_CODES;
+
+/**
+ * Response class
+ *
+ * @param   Stream  body  Readable stream
+ * @param   Object  opts  Response options
+ * @return  Void
+ */
+class Response {
+	constructor() {
+		let body = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+		let opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+		Body.call(this, body, opts);
+
+		const status = opts.status || 200;
+		const headers = new Headers(opts.headers);
+
+		if (body != null && !headers.has('Content-Type')) {
+			const contentType = extractContentType(body);
+			if (contentType) {
+				headers.append('Content-Type', contentType);
+			}
+		}
+
+		this[INTERNALS$1] = {
+			url: opts.url,
+			status,
+			statusText: opts.statusText || STATUS_CODES[status],
+			headers,
+			counter: opts.counter
+		};
+	}
+
+	get url() {
+		return this[INTERNALS$1].url || '';
+	}
+
+	get status() {
+		return this[INTERNALS$1].status;
+	}
+
+	/**
+  * Convenience property representing if the request ended normally
+  */
+	get ok() {
+		return this[INTERNALS$1].status >= 200 && this[INTERNALS$1].status < 300;
+	}
+
+	get redirected() {
+		return this[INTERNALS$1].counter > 0;
+	}
+
+	get statusText() {
+		return this[INTERNALS$1].statusText;
+	}
+
+	get headers() {
+		return this[INTERNALS$1].headers;
+	}
+
+	/**
+  * Clone this response
+  *
+  * @return  Response
+  */
+	clone() {
+		return new Response(clone(this), {
+			url: this.url,
+			status: this.status,
+			statusText: this.statusText,
+			headers: this.headers,
+			ok: this.ok,
+			redirected: this.redirected
+		});
+	}
+}
+
+Body.mixIn(Response.prototype);
+
+Object.defineProperties(Response.prototype, {
+	url: { enumerable: true },
+	status: { enumerable: true },
+	ok: { enumerable: true },
+	redirected: { enumerable: true },
+	statusText: { enumerable: true },
+	headers: { enumerable: true },
+	clone: { enumerable: true }
+});
+
+Object.defineProperty(Response.prototype, Symbol.toStringTag, {
+	value: 'Response',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+const INTERNALS$2 = Symbol('Request internals');
+const URL = Url.URL || whatwgUrl.URL;
+
+// fix an issue where "format", "parse" aren't a named export for node <10
+const parse_url = Url.parse;
+const format_url = Url.format;
+
+/**
+ * Wrapper around `new URL` to handle arbitrary URLs
+ *
+ * @param  {string} urlStr
+ * @return {void}
+ */
+function parseURL(urlStr) {
+	/*
+ 	Check whether the URL is absolute or not
+ 		Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
+ 	Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
+ */
+	if (/^[a-zA-Z][a-zA-Z\d+\-.]*:/.exec(urlStr)) {
+		urlStr = new URL(urlStr).toString();
+	}
+
+	// Fallback to old implementation for arbitrary URLs
+	return parse_url(urlStr);
+}
+
+const streamDestructionSupported = 'destroy' in Stream.Readable.prototype;
+
+/**
+ * Check if a value is an instance of Request.
+ *
+ * @param   Mixed   input
+ * @return  Boolean
+ */
+function isRequest(input) {
+	return typeof input === 'object' && typeof input[INTERNALS$2] === 'object';
+}
+
+function isAbortSignal(signal) {
+	const proto = signal && typeof signal === 'object' && Object.getPrototypeOf(signal);
+	return !!(proto && proto.constructor.name === 'AbortSignal');
+}
+
+/**
+ * Request class
+ *
+ * @param   Mixed   input  Url or Request instance
+ * @param   Object  init   Custom options
+ * @return  Void
+ */
+class Request {
+	constructor(input) {
+		let init = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+		let parsedURL;
+
+		// normalize input
+		if (!isRequest(input)) {
+			if (input && input.href) {
+				// in order to support Node.js' Url objects; though WHATWG's URL objects
+				// will fall into this branch also (since their `toString()` will return
+				// `href` property anyway)
+				parsedURL = parseURL(input.href);
+			} else {
+				// coerce input to a string before attempting to parse
+				parsedURL = parseURL(`${input}`);
+			}
+			input = {};
+		} else {
+			parsedURL = parseURL(input.url);
+		}
+
+		let method = init.method || input.method || 'GET';
+		method = method.toUpperCase();
+
+		if ((init.body != null || isRequest(input) && input.body !== null) && (method === 'GET' || method === 'HEAD')) {
+			throw new TypeError('Request with GET/HEAD method cannot have body');
+		}
+
+		let inputBody = init.body != null ? init.body : isRequest(input) && input.body !== null ? clone(input) : null;
+
+		Body.call(this, inputBody, {
+			timeout: init.timeout || input.timeout || 0,
+			size: init.size || input.size || 0
+		});
+
+		const headers = new Headers(init.headers || input.headers || {});
+
+		if (inputBody != null && !headers.has('Content-Type')) {
+			const contentType = extractContentType(inputBody);
+			if (contentType) {
+				headers.append('Content-Type', contentType);
+			}
+		}
+
+		let signal = isRequest(input) ? input.signal : null;
+		if ('signal' in init) signal = init.signal;
+
+		if (signal != null && !isAbortSignal(signal)) {
+			throw new TypeError('Expected signal to be an instanceof AbortSignal');
+		}
+
+		this[INTERNALS$2] = {
+			method,
+			redirect: init.redirect || input.redirect || 'follow',
+			headers,
+			parsedURL,
+			signal
+		};
+
+		// node-fetch-only options
+		this.follow = init.follow !== undefined ? init.follow : input.follow !== undefined ? input.follow : 20;
+		this.compress = init.compress !== undefined ? init.compress : input.compress !== undefined ? input.compress : true;
+		this.counter = init.counter || input.counter || 0;
+		this.agent = init.agent || input.agent;
+	}
+
+	get method() {
+		return this[INTERNALS$2].method;
+	}
+
+	get url() {
+		return format_url(this[INTERNALS$2].parsedURL);
+	}
+
+	get headers() {
+		return this[INTERNALS$2].headers;
+	}
+
+	get redirect() {
+		return this[INTERNALS$2].redirect;
+	}
+
+	get signal() {
+		return this[INTERNALS$2].signal;
+	}
+
+	/**
+  * Clone this request
+  *
+  * @return  Request
+  */
+	clone() {
+		return new Request(this);
+	}
+}
+
+Body.mixIn(Request.prototype);
+
+Object.defineProperty(Request.prototype, Symbol.toStringTag, {
+	value: 'Request',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+Object.defineProperties(Request.prototype, {
+	method: { enumerable: true },
+	url: { enumerable: true },
+	headers: { enumerable: true },
+	redirect: { enumerable: true },
+	clone: { enumerable: true },
+	signal: { enumerable: true }
+});
+
+/**
+ * Convert a Request to Node.js http request options.
+ *
+ * @param   Request  A Request instance
+ * @return  Object   The options object to be passed to http.request
+ */
+function getNodeRequestOptions(request) {
+	const parsedURL = request[INTERNALS$2].parsedURL;
+	const headers = new Headers(request[INTERNALS$2].headers);
+
+	// fetch step 1.3
+	if (!headers.has('Accept')) {
+		headers.set('Accept', '*/*');
+	}
+
+	// Basic fetch
+	if (!parsedURL.protocol || !parsedURL.hostname) {
+		throw new TypeError('Only absolute URLs are supported');
+	}
+
+	if (!/^https?:$/.test(parsedURL.protocol)) {
+		throw new TypeError('Only HTTP(S) protocols are supported');
+	}
+
+	if (request.signal && request.body instanceof Stream.Readable && !streamDestructionSupported) {
+		throw new Error('Cancellation of streamed requests with AbortSignal is not supported in node < 8');
+	}
+
+	// HTTP-network-or-cache fetch steps 2.4-2.7
+	let contentLengthValue = null;
+	if (request.body == null && /^(POST|PUT)$/i.test(request.method)) {
+		contentLengthValue = '0';
+	}
+	if (request.body != null) {
+		const totalBytes = getTotalBytes(request);
+		if (typeof totalBytes === 'number') {
+			contentLengthValue = String(totalBytes);
+		}
+	}
+	if (contentLengthValue) {
+		headers.set('Content-Length', contentLengthValue);
+	}
+
+	// HTTP-network-or-cache fetch step 2.11
+	if (!headers.has('User-Agent')) {
+		headers.set('User-Agent', 'node-fetch/1.0 (+https://github.com/bitinn/node-fetch)');
+	}
+
+	// HTTP-network-or-cache fetch step 2.15
+	if (request.compress && !headers.has('Accept-Encoding')) {
+		headers.set('Accept-Encoding', 'gzip,deflate');
+	}
+
+	let agent = request.agent;
+	if (typeof agent === 'function') {
+		agent = agent(parsedURL);
+	}
+
+	if (!headers.has('Connection') && !agent) {
+		headers.set('Connection', 'close');
+	}
+
+	// HTTP-network fetch step 4.2
+	// chunked encoding is handled by Node.js
+
+	return Object.assign({}, parsedURL, {
+		method: request.method,
+		headers: exportNodeCompatibleHeaders(headers),
+		agent
+	});
+}
+
+/**
+ * abort-error.js
+ *
+ * AbortError interface for cancelled requests
+ */
+
+/**
+ * Create AbortError instance
+ *
+ * @param   String      message      Error message for human
+ * @return  AbortError
+ */
+function AbortError(message) {
+  Error.call(this, message);
+
+  this.type = 'aborted';
+  this.message = message;
+
+  // hide custom error implementation details from end-users
+  Error.captureStackTrace(this, this.constructor);
+}
+
+AbortError.prototype = Object.create(Error.prototype);
+AbortError.prototype.constructor = AbortError;
+AbortError.prototype.name = 'AbortError';
+
+const URL$1 = Url.URL || whatwgUrl.URL;
+
+// fix an issue where "PassThrough", "resolve" aren't a named export for node <10
+const PassThrough$1 = Stream.PassThrough;
+
+const isDomainOrSubdomain = function isDomainOrSubdomain(destination, original) {
+	const orig = new URL$1(original).hostname;
+	const dest = new URL$1(destination).hostname;
+
+	return orig === dest || orig[orig.length - dest.length - 1] === '.' && orig.endsWith(dest);
+};
+
+/**
+ * Fetch function
+ *
+ * @param   Mixed    url   Absolute url or Request instance
+ * @param   Object   opts  Fetch options
+ * @return  Promise
+ */
+function fetch(url, opts) {
+
+	// allow custom promise
+	if (!fetch.Promise) {
+		throw new Error('native promise missing, set fetch.Promise to your favorite alternative');
+	}
+
+	Body.Promise = fetch.Promise;
+
+	// wrap http.request into fetch
+	return new fetch.Promise(function (resolve, reject) {
+		// build request object
+		const request = new Request(url, opts);
+		const options = getNodeRequestOptions(request);
+
+		const send = (options.protocol === 'https:' ? https : http).request;
+		const signal = request.signal;
+
+		let response = null;
+
+		const abort = function abort() {
+			let error = new AbortError('The user aborted a request.');
+			reject(error);
+			if (request.body && request.body instanceof Stream.Readable) {
+				request.body.destroy(error);
+			}
+			if (!response || !response.body) return;
+			response.body.emit('error', error);
+		};
+
+		if (signal && signal.aborted) {
+			abort();
+			return;
+		}
+
+		const abortAndFinalize = function abortAndFinalize() {
+			abort();
+			finalize();
+		};
+
+		// send request
+		const req = send(options);
+		let reqTimeout;
+
+		if (signal) {
+			signal.addEventListener('abort', abortAndFinalize);
+		}
+
+		function finalize() {
+			req.abort();
+			if (signal) signal.removeEventListener('abort', abortAndFinalize);
+			clearTimeout(reqTimeout);
+		}
+
+		if (request.timeout) {
+			req.once('socket', function (socket) {
+				reqTimeout = setTimeout(function () {
+					reject(new FetchError(`network timeout at: ${request.url}`, 'request-timeout'));
+					finalize();
+				}, request.timeout);
+			});
+		}
+
+		req.on('error', function (err) {
+			reject(new FetchError(`request to ${request.url} failed, reason: ${err.message}`, 'system', err));
+			finalize();
+		});
+
+		req.on('response', function (res) {
+			clearTimeout(reqTimeout);
+
+			const headers = createHeadersLenient(res.headers);
+
+			// HTTP fetch step 5
+			if (fetch.isRedirect(res.statusCode)) {
+				// HTTP fetch step 5.2
+				const location = headers.get('Location');
+
+				// HTTP fetch step 5.3
+				let locationURL = null;
+				try {
+					locationURL = location === null ? null : new URL$1(location, request.url).toString();
+				} catch (err) {
+					// error here can only be invalid URL in Location: header
+					// do not throw when options.redirect == manual
+					// let the user extract the errorneous redirect URL
+					if (request.redirect !== 'manual') {
+						reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect'));
+						finalize();
+						return;
+					}
+				}
+
+				// HTTP fetch step 5.5
+				switch (request.redirect) {
+					case 'error':
+						reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect'));
+						finalize();
+						return;
+					case 'manual':
+						// node-fetch-specific step: make manual redirect a bit easier to use by setting the Location header value to the resolved URL.
+						if (locationURL !== null) {
+							// handle corrupted header
+							try {
+								headers.set('Location', locationURL);
+							} catch (err) {
+								// istanbul ignore next: nodejs server prevent invalid response headers, we can't test this through normal request
+								reject(err);
+							}
+						}
+						break;
+					case 'follow':
+						// HTTP-redirect fetch step 2
+						if (locationURL === null) {
+							break;
+						}
+
+						// HTTP-redirect fetch step 5
+						if (request.counter >= request.follow) {
+							reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect'));
+							finalize();
+							return;
+						}
+
+						// HTTP-redirect fetch step 6 (counter increment)
+						// Create a new Request object.
+						const requestOpts = {
+							headers: new Headers(request.headers),
+							follow: request.follow,
+							counter: request.counter + 1,
+							agent: request.agent,
+							compress: request.compress,
+							method: request.method,
+							body: request.body,
+							signal: request.signal,
+							timeout: request.timeout,
+							size: request.size
+						};
+
+						if (!isDomainOrSubdomain(request.url, locationURL)) {
+							for (const name of ['authorization', 'www-authenticate', 'cookie', 'cookie2']) {
+								requestOpts.headers.delete(name);
+							}
+						}
+
+						// HTTP-redirect fetch step 9
+						if (res.statusCode !== 303 && request.body && getTotalBytes(request) === null) {
+							reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect'));
+							finalize();
+							return;
+						}
+
+						// HTTP-redirect fetch step 11
+						if (res.statusCode === 303 || (res.statusCode === 301 || res.statusCode === 302) && request.method === 'POST') {
+							requestOpts.method = 'GET';
+							requestOpts.body = undefined;
+							requestOpts.headers.delete('content-length');
+						}
+
+						// HTTP-redirect fetch step 15
+						resolve(fetch(new Request(locationURL, requestOpts)));
+						finalize();
+						return;
+				}
+			}
+
+			// prepare response
+			res.once('end', function () {
+				if (signal) signal.removeEventListener('abort', abortAndFinalize);
+			});
+			let body = res.pipe(new PassThrough$1());
+
+			const response_options = {
+				url: request.url,
+				status: res.statusCode,
+				statusText: res.statusMessage,
+				headers: headers,
+				size: request.size,
+				timeout: request.timeout,
+				counter: request.counter
+			};
+
+			// HTTP-network fetch step 12.1.1.3
+			const codings = headers.get('Content-Encoding');
+
+			// HTTP-network fetch step 12.1.1.4: handle content codings
+
+			// in following scenarios we ignore compression support
+			// 1. compression support is disabled
+			// 2. HEAD request
+			// 3. no Content-Encoding header
+			// 4. no content response (204)
+			// 5. content not modified response (304)
+			if (!request.compress || request.method === 'HEAD' || codings === null || res.statusCode === 204 || res.statusCode === 304) {
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// For Node v6+
+			// Be less strict when decoding compressed responses, since sometimes
+			// servers send slightly invalid responses that are still accepted
+			// by common browsers.
+			// Always using Z_SYNC_FLUSH is what cURL does.
+			const zlibOptions = {
+				flush: zlib.Z_SYNC_FLUSH,
+				finishFlush: zlib.Z_SYNC_FLUSH
+			};
+
+			// for gzip
+			if (codings == 'gzip' || codings == 'x-gzip') {
+				body = body.pipe(zlib.createGunzip(zlibOptions));
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// for deflate
+			if (codings == 'deflate' || codings == 'x-deflate') {
+				// handle the infamous raw deflate response from old servers
+				// a hack for old IIS and Apache servers
+				const raw = res.pipe(new PassThrough$1());
+				raw.once('data', function (chunk) {
+					// see http://stackoverflow.com/questions/37519828
+					if ((chunk[0] & 0x0F) === 0x08) {
+						body = body.pipe(zlib.createInflate());
+					} else {
+						body = body.pipe(zlib.createInflateRaw());
+					}
+					response = new Response(body, response_options);
+					resolve(response);
+				});
+				return;
+			}
+
+			// for br
+			if (codings == 'br' && typeof zlib.createBrotliDecompress === 'function') {
+				body = body.pipe(zlib.createBrotliDecompress());
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// otherwise, use response as-is
+			response = new Response(body, response_options);
+			resolve(response);
+		});
+
+		writeToStream(req, request);
+	});
+}
+/**
+ * Redirect code matching
+ *
+ * @param   Number   code  Status code
+ * @return  Boolean
+ */
+fetch.isRedirect = function (code) {
+	return code === 301 || code === 302 || code === 303 || code === 307 || code === 308;
+};
+
+// expose Promise
+fetch.Promise = global.Promise;
+
+module.exports = exports = fetch;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = exports;
+exports.Headers = Headers;
+exports.Request = Request;
+exports.Response = Response;
+exports.FetchError = FetchError;

+import Stream from 'stream';
+import http from 'http';
+import Url from 'url';
+import whatwgUrl from 'whatwg-url';
+import https from 'https';
+import zlib from 'zlib';
+
+// Based on https://github.com/tmpvar/jsdom/blob/aa85b2abf07766ff7bf5c1f6daafb3726f2f2db5/lib/jsdom/living/blob.js
+
+// fix for "Readable" isn't a named export issue
+const Readable = Stream.Readable;
+
+const BUFFER = Symbol('buffer');
+const TYPE = Symbol('type');
+
+class Blob {
+	constructor() {
+		this[TYPE] = '';
+
+		const blobParts = arguments[0];
+		const options = arguments[1];
+
+		const buffers = [];
+		let size = 0;
+
+		if (blobParts) {
+			const a = blobParts;
+			const length = Number(a.length);
+			for (let i = 0; i < length; i++) {
+				const element = a[i];
+				let buffer;
+				if (element instanceof Buffer) {
+					buffer = element;
+				} else if (ArrayBuffer.isView(element)) {
+					buffer = Buffer.from(element.buffer, element.byteOffset, element.byteLength);
+				} else if (element instanceof ArrayBuffer) {
+					buffer = Buffer.from(element);
+				} else if (element instanceof Blob) {
+					buffer = element[BUFFER];
+				} else {
+					buffer = Buffer.from(typeof element === 'string' ? element : String(element));
+				}
+				size += buffer.length;
+				buffers.push(buffer);
+			}
+		}
+
+		this[BUFFER] = Buffer.concat(buffers);
+
+		let type = options && options.type !== undefined && String(options.type).toLowerCase();
+		if (type && !/[^\u0020-\u007E]/.test(type)) {
+			this[TYPE] = type;
+		}
+	}
+	get size() {
+		return this[BUFFER].length;
+	}
+	get type() {
+		return this[TYPE];
+	}
+	text() {
+		return Promise.resolve(this[BUFFER].toString());
+	}
+	arrayBuffer() {
+		const buf = this[BUFFER];
+		const ab = buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		return Promise.resolve(ab);
+	}
+	stream() {
+		const readable = new Readable();
+		readable._read = function () {};
+		readable.push(this[BUFFER]);
+		readable.push(null);
+		return readable;
+	}
+	toString() {
+		return '[object Blob]';
+	}
+	slice() {
+		const size = this.size;
+
+		const start = arguments[0];
+		const end = arguments[1];
+		let relativeStart, relativeEnd;
+		if (start === undefined) {
+			relativeStart = 0;
+		} else if (start < 0) {
+			relativeStart = Math.max(size + start, 0);
+		} else {
+			relativeStart = Math.min(start, size);
+		}
+		if (end === undefined) {
+			relativeEnd = size;
+		} else if (end < 0) {
+			relativeEnd = Math.max(size + end, 0);
+		} else {
+			relativeEnd = Math.min(end, size);
+		}
+		const span = Math.max(relativeEnd - relativeStart, 0);
+
+		const buffer = this[BUFFER];
+		const slicedBuffer = buffer.slice(relativeStart, relativeStart + span);
+		const blob = new Blob([], { type: arguments[2] });
+		blob[BUFFER] = slicedBuffer;
+		return blob;
+	}
+}
+
+Object.defineProperties(Blob.prototype, {
+	size: { enumerable: true },
+	type: { enumerable: true },
+	slice: { enumerable: true }
+});
+
+Object.defineProperty(Blob.prototype, Symbol.toStringTag, {
+	value: 'Blob',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+/**
+ * fetch-error.js
+ *
+ * FetchError interface for operational errors
+ */
+
+/**
+ * Create FetchError instance
+ *
+ * @param   String      message      Error message for human
+ * @param   String      type         Error type for machine
+ * @param   String      systemError  For Node.js system error
+ * @return  FetchError
+ */
+function FetchError(message, type, systemError) {
+  Error.call(this, message);
+
+  this.message = message;
+  this.type = type;
+
+  // when err.type is `system`, err.code contains system error code
+  if (systemError) {
+    this.code = this.errno = systemError.code;
+  }
+
+  // hide custom error implementation details from end-users
+  Error.captureStackTrace(this, this.constructor);
+}
+
+FetchError.prototype = Object.create(Error.prototype);
+FetchError.prototype.constructor = FetchError;
+FetchError.prototype.name = 'FetchError';
+
+let convert;
+try {
+	convert = require('encoding').convert;
+} catch (e) {}
+
+const INTERNALS = Symbol('Body internals');
+
+// fix an issue where "PassThrough" isn't a named export for node <10
+const PassThrough = Stream.PassThrough;
+
+/**
+ * Body mixin
+ *
+ * Ref: https://fetch.spec.whatwg.org/#body
+ *
+ * @param   Stream  body  Readable stream
+ * @param   Object  opts  Response options
+ * @return  Void
+ */
+function Body(body) {
+	var _this = this;
+
+	var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
+	    _ref$size = _ref.size;
+
+	let size = _ref$size === undefined ? 0 : _ref$size;
+	var _ref$timeout = _ref.timeout;
+	let timeout = _ref$timeout === undefined ? 0 : _ref$timeout;
+
+	if (body == null) {
+		// body is undefined or null
+		body = null;
+	} else if (isURLSearchParams(body)) {
+		// body is a URLSearchParams
+		body = Buffer.from(body.toString());
+	} else if (isBlob(body)) ; else if (Buffer.isBuffer(body)) ; else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
+		// body is ArrayBuffer
+		body = Buffer.from(body);
+	} else if (ArrayBuffer.isView(body)) {
+		// body is ArrayBufferView
+		body = Buffer.from(body.buffer, body.byteOffset, body.byteLength);
+	} else if (body instanceof Stream) ; else {
+		// none of the above
+		// coerce to string then buffer
+		body = Buffer.from(String(body));
+	}
+	this[INTERNALS] = {
+		body,
+		disturbed: false,
+		error: null
+	};
+	this.size = size;
+	this.timeout = timeout;
+
+	if (body instanceof Stream) {
+		body.on('error', function (err) {
+			const error = err.name === 'AbortError' ? err : new FetchError(`Invalid response body while trying to fetch ${_this.url}: ${err.message}`, 'system', err);
+			_this[INTERNALS].error = error;
+		});
+	}
+}
+
+Body.prototype = {
+	get body() {
+		return this[INTERNALS].body;
+	},
+
+	get bodyUsed() {
+		return this[INTERNALS].disturbed;
+	},
+
+	/**
+  * Decode response as ArrayBuffer
+  *
+  * @return  Promise
+  */
+	arrayBuffer() {
+		return consumeBody.call(this).then(function (buf) {
+			return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
+		});
+	},
+
+	/**
+  * Return raw response as Blob
+  *
+  * @return Promise
+  */
+	blob() {
+		let ct = this.headers && this.headers.get('content-type') || '';
+		return consumeBody.call(this).then(function (buf) {
+			return Object.assign(
+			// Prevent copying
+			new Blob([], {
+				type: ct.toLowerCase()
+			}), {
+				[BUFFER]: buf
+			});
+		});
+	},
+
+	/**
+  * Decode response as json
+  *
+  * @return  Promise
+  */
+	json() {
+		var _this2 = this;
+
+		return consumeBody.call(this).then(function (buffer) {
+			try {
+				return JSON.parse(buffer.toString());
+			} catch (err) {
+				return Body.Promise.reject(new FetchError(`invalid json response body at ${_this2.url} reason: ${err.message}`, 'invalid-json'));
+			}
+		});
+	},
+
+	/**
+  * Decode response as text
+  *
+  * @return  Promise
+  */
+	text() {
+		return consumeBody.call(this).then(function (buffer) {
+			return buffer.toString();
+		});
+	},
+
+	/**
+  * Decode response as buffer (non-spec api)
+  *
+  * @return  Promise
+  */
+	buffer() {
+		return consumeBody.call(this);
+	},
+
+	/**
+  * Decode response as text, while automatically detecting the encoding and
+  * trying to decode to UTF-8 (non-spec api)
+  *
+  * @return  Promise
+  */
+	textConverted() {
+		var _this3 = this;
+
+		return consumeBody.call(this).then(function (buffer) {
+			return convertBody(buffer, _this3.headers);
+		});
+	}
+};
+
+// In browsers, all properties are enumerable.
+Object.defineProperties(Body.prototype, {
+	body: { enumerable: true },
+	bodyUsed: { enumerable: true },
+	arrayBuffer: { enumerable: true },
+	blob: { enumerable: true },
+	json: { enumerable: true },
+	text: { enumerable: true }
+});
+
+Body.mixIn = function (proto) {
+	for (const name of Object.getOwnPropertyNames(Body.prototype)) {
+		// istanbul ignore else: future proof
+		if (!(name in proto)) {
+			const desc = Object.getOwnPropertyDescriptor(Body.prototype, name);
+			Object.defineProperty(proto, name, desc);
+		}
+	}
+};
+
+/**
+ * Consume and convert an entire Body to a Buffer.
+ *
+ * Ref: https://fetch.spec.whatwg.org/#concept-body-consume-body
+ *
+ * @return  Promise
+ */
+function consumeBody() {
+	var _this4 = this;
+
+	if (this[INTERNALS].disturbed) {
+		return Body.Promise.reject(new TypeError(`body used already for: ${this.url}`));
+	}
+
+	this[INTERNALS].disturbed = true;
+
+	if (this[INTERNALS].error) {
+		return Body.Promise.reject(this[INTERNALS].error);
+	}
+
+	let body = this.body;
+
+	// body is null
+	if (body === null) {
+		return Body.Promise.resolve(Buffer.alloc(0));
+	}
+
+	// body is blob
+	if (isBlob(body)) {
+		body = body.stream();
+	}
+
+	// body is buffer
+	if (Buffer.isBuffer(body)) {
+		return Body.Promise.resolve(body);
+	}
+
+	// istanbul ignore if: should never happen
+	if (!(body instanceof Stream)) {
+		return Body.Promise.resolve(Buffer.alloc(0));
+	}
+
+	// body is stream
+	// get ready to actually consume the body
+	let accum = [];
+	let accumBytes = 0;
+	let abort = false;
+
+	return new Body.Promise(function (resolve, reject) {
+		let resTimeout;
+
+		// allow timeout on slow response body
+		if (_this4.timeout) {
+			resTimeout = setTimeout(function () {
+				abort = true;
+				reject(new FetchError(`Response timeout while trying to fetch ${_this4.url} (over ${_this4.timeout}ms)`, 'body-timeout'));
+			}, _this4.timeout);
+		}
+
+		// handle stream errors
+		body.on('error', function (err) {
+			if (err.name === 'AbortError') {
+				// if the request was aborted, reject with this Error
+				abort = true;
+				reject(err);
+			} else {
+				// other errors, such as incorrect content-encoding
+				reject(new FetchError(`Invalid response body while trying to fetch ${_this4.url}: ${err.message}`, 'system', err));
+			}
+		});
+
+		body.on('data', function (chunk) {
+			if (abort || chunk === null) {
+				return;
+			}
+
+			if (_this4.size && accumBytes + chunk.length > _this4.size) {
+				abort = true;
+				reject(new FetchError(`content size at ${_this4.url} over limit: ${_this4.size}`, 'max-size'));
+				return;
+			}
+
+			accumBytes += chunk.length;
+			accum.push(chunk);
+		});
+
+		body.on('end', function () {
+			if (abort) {
+				return;
+			}
+
+			clearTimeout(resTimeout);
+
+			try {
+				resolve(Buffer.concat(accum, accumBytes));
+			} catch (err) {
+				// handle streams that have accumulated too much data (issue #414)
+				reject(new FetchError(`Could not create Buffer from response body for ${_this4.url}: ${err.message}`, 'system', err));
+			}
+		});
+	});
+}
+
+/**
+ * Detect buffer encoding and convert to target encoding
+ * ref: http://www.w3.org/TR/2011/WD-html5-20110113/parsing.html#determining-the-character-encoding
+ *
+ * @param   Buffer  buffer    Incoming buffer
+ * @param   String  encoding  Target encoding
+ * @return  String
+ */
+function convertBody(buffer, headers) {
+	if (typeof convert !== 'function') {
+		throw new Error('The package `encoding` must be installed to use the textConverted() function');
+	}
+
+	const ct = headers.get('content-type');
+	let charset = 'utf-8';
+	let res, str;
+
+	// header
+	if (ct) {
+		res = /charset=([^;]*)/i.exec(ct);
+	}
+
+	// no charset in content type, peek at response body for at most 1024 bytes
+	str = buffer.slice(0, 1024).toString();
+
+	// html5
+	if (!res && str) {
+		res = /<meta.+?charset=(['"])(.+?)\1/i.exec(str);
+	}
+
+	// html4
+	if (!res && str) {
+		res = /<meta[\s]+?http-equiv=(['"])content-type\1[\s]+?content=(['"])(.+?)\2/i.exec(str);
+		if (!res) {
+			res = /<meta[\s]+?content=(['"])(.+?)\1[\s]+?http-equiv=(['"])content-type\3/i.exec(str);
+			if (res) {
+				res.pop(); // drop last quote
+			}
+		}
+
+		if (res) {
+			res = /charset=(.*)/i.exec(res.pop());
+		}
+	}
+
+	// xml
+	if (!res && str) {
+		res = /<\?xml.+?encoding=(['"])(.+?)\1/i.exec(str);
+	}
+
+	// found charset
+	if (res) {
+		charset = res.pop();
+
+		// prevent decode issues when sites use incorrect encoding
+		// ref: https://hsivonen.fi/encoding-menu/
+		if (charset === 'gb2312' || charset === 'gbk') {
+			charset = 'gb18030';
+		}
+	}
+
+	// turn raw buffers into a single utf-8 buffer
+	return convert(buffer, 'UTF-8', charset).toString();
+}
+
+/**
+ * Detect a URLSearchParams object
+ * ref: https://github.com/bitinn/node-fetch/issues/296#issuecomment-307598143
+ *
+ * @param   Object  obj     Object to detect by type or brand
+ * @return  String
+ */
+function isURLSearchParams(obj) {
+	// Duck-typing as a necessary condition.
+	if (typeof obj !== 'object' || typeof obj.append !== 'function' || typeof obj.delete !== 'function' || typeof obj.get !== 'function' || typeof obj.getAll !== 'function' || typeof obj.has !== 'function' || typeof obj.set !== 'function') {
+		return false;
+	}
+
+	// Brand-checking and more duck-typing as optional condition.
+	return obj.constructor.name === 'URLSearchParams' || Object.prototype.toString.call(obj) === '[object URLSearchParams]' || typeof obj.sort === 'function';
+}
+
+/**
+ * Check if `obj` is a W3C `Blob` object (which `File` inherits from)
+ * @param  {*} obj
+ * @return {boolean}
+ */
+function isBlob(obj) {
+	return typeof obj === 'object' && typeof obj.arrayBuffer === 'function' && typeof obj.type === 'string' && typeof obj.stream === 'function' && typeof obj.constructor === 'function' && typeof obj.constructor.name === 'string' && /^(Blob|File)$/.test(obj.constructor.name) && /^(Blob|File)$/.test(obj[Symbol.toStringTag]);
+}
+
+/**
+ * Clone body given Res/Req instance
+ *
+ * @param   Mixed  instance  Response or Request instance
+ * @return  Mixed
+ */
+function clone(instance) {
+	let p1, p2;
+	let body = instance.body;
+
+	// don't allow cloning a used body
+	if (instance.bodyUsed) {
+		throw new Error('cannot clone body after it is used');
+	}
+
+	// check that body is a stream and not form-data object
+	// note: we can't clone the form-data object without having it as a dependency
+	if (body instanceof Stream && typeof body.getBoundary !== 'function') {
+		// tee instance body
+		p1 = new PassThrough();
+		p2 = new PassThrough();
+		body.pipe(p1);
+		body.pipe(p2);
+		// set instance body to teed body and return the other teed body
+		instance[INTERNALS].body = p1;
+		body = p2;
+	}
+
+	return body;
+}
+
+/**
+ * Performs the operation "extract a `Content-Type` value from |object|" as
+ * specified in the specification:
+ * https://fetch.spec.whatwg.org/#concept-bodyinit-extract
+ *
+ * This function assumes that instance.body is present.
+ *
+ * @param   Mixed  instance  Any options.body input
+ */
+function extractContentType(body) {
+	if (body === null) {
+		// body is null
+		return null;
+	} else if (typeof body === 'string') {
+		// body is string
+		return 'text/plain;charset=UTF-8';
+	} else if (isURLSearchParams(body)) {
+		// body is a URLSearchParams
+		return 'application/x-www-form-urlencoded;charset=UTF-8';
+	} else if (isBlob(body)) {
+		// body is blob
+		return body.type || null;
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		return null;
+	} else if (Object.prototype.toString.call(body) === '[object ArrayBuffer]') {
+		// body is ArrayBuffer
+		return null;
+	} else if (ArrayBuffer.isView(body)) {
+		// body is ArrayBufferView
+		return null;
+	} else if (typeof body.getBoundary === 'function') {
+		// detect form data input from form-data module
+		return `multipart/form-data;boundary=${body.getBoundary()}`;
+	} else if (body instanceof Stream) {
+		// body is stream
+		// can't really do much about this
+		return null;
+	} else {
+		// Body constructor defaults other things to string
+		return 'text/plain;charset=UTF-8';
+	}
+}
+
+/**
+ * The Fetch Standard treats this as if "total bytes" is a property on the body.
+ * For us, we have to explicitly get it with a function.
+ *
+ * ref: https://fetch.spec.whatwg.org/#concept-body-total-bytes
+ *
+ * @param   Body    instance   Instance of Body
+ * @return  Number?            Number of bytes, or null if not possible
+ */
+function getTotalBytes(instance) {
+	const body = instance.body;
+
+
+	if (body === null) {
+		// body is null
+		return 0;
+	} else if (isBlob(body)) {
+		return body.size;
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		return body.length;
+	} else if (body && typeof body.getLengthSync === 'function') {
+		// detect form data input from form-data module
+		if (body._lengthRetrievers && body._lengthRetrievers.length == 0 || // 1.x
+		body.hasKnownLength && body.hasKnownLength()) {
+			// 2.x
+			return body.getLengthSync();
+		}
+		return null;
+	} else {
+		// body is stream
+		return null;
+	}
+}
+
+/**
+ * Write a Body to a Node.js WritableStream (e.g. http.Request) object.
+ *
+ * @param   Body    instance   Instance of Body
+ * @return  Void
+ */
+function writeToStream(dest, instance) {
+	const body = instance.body;
+
+
+	if (body === null) {
+		// body is null
+		dest.end();
+	} else if (isBlob(body)) {
+		body.stream().pipe(dest);
+	} else if (Buffer.isBuffer(body)) {
+		// body is buffer
+		dest.write(body);
+		dest.end();
+	} else {
+		// body is stream
+		body.pipe(dest);
+	}
+}
+
+// expose Promise
+Body.Promise = global.Promise;
+
+/**
+ * headers.js
+ *
+ * Headers class offers convenient helpers
+ */
+
+const invalidTokenRegex = /[^\^_`a-zA-Z\-0-9!#$%&'*+.|~]/;
+const invalidHeaderCharRegex = /[^\t\x20-\x7e\x80-\xff]/;
+
+function validateName(name) {
+	name = `${name}`;
+	if (invalidTokenRegex.test(name) || name === '') {
+		throw new TypeError(`${name} is not a legal HTTP header name`);
+	}
+}
+
+function validateValue(value) {
+	value = `${value}`;
+	if (invalidHeaderCharRegex.test(value)) {
+		throw new TypeError(`${value} is not a legal HTTP header value`);
+	}
+}
+
+/**
+ * Find the key in the map object given a header name.
+ *
+ * Returns undefined if not found.
+ *
+ * @param   String  name  Header name
+ * @return  String|Undefined
+ */
+function find(map, name) {
+	name = name.toLowerCase();
+	for (const key in map) {
+		if (key.toLowerCase() === name) {
+			return key;
+		}
+	}
+	return undefined;
+}
+
+const MAP = Symbol('map');
+class Headers {
+	/**
+  * Headers class
+  *
+  * @param   Object  headers  Response headers
+  * @return  Void
+  */
+	constructor() {
+		let init = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : undefined;
+
+		this[MAP] = Object.create(null);
+
+		if (init instanceof Headers) {
+			const rawHeaders = init.raw();
+			const headerNames = Object.keys(rawHeaders);
+
+			for (const headerName of headerNames) {
+				for (const value of rawHeaders[headerName]) {
+					this.append(headerName, value);
+				}
+			}
+
+			return;
+		}
+
+		// We don't worry about converting prop to ByteString here as append()
+		// will handle it.
+		if (init == null) ; else if (typeof init === 'object') {
+			const method = init[Symbol.iterator];
+			if (method != null) {
+				if (typeof method !== 'function') {
+					throw new TypeError('Header pairs must be iterable');
+				}
+
+				// sequence<sequence<ByteString>>
+				// Note: per spec we have to first exhaust the lists then process them
+				const pairs = [];
+				for (const pair of init) {
+					if (typeof pair !== 'object' || typeof pair[Symbol.iterator] !== 'function') {
+						throw new TypeError('Each header pair must be iterable');
+					}
+					pairs.push(Array.from(pair));
+				}
+
+				for (const pair of pairs) {
+					if (pair.length !== 2) {
+						throw new TypeError('Each header pair must be a name/value tuple');
+					}
+					this.append(pair[0], pair[1]);
+				}
+			} else {
+				// record<ByteString, ByteString>
+				for (const key of Object.keys(init)) {
+					const value = init[key];
+					this.append(key, value);
+				}
+			}
+		} else {
+			throw new TypeError('Provided initializer must be an object');
+		}
+	}
+
+	/**
+  * Return combined header value given name
+  *
+  * @param   String  name  Header name
+  * @return  Mixed
+  */
+	get(name) {
+		name = `${name}`;
+		validateName(name);
+		const key = find(this[MAP], name);
+		if (key === undefined) {
+			return null;
+		}
+
+		return this[MAP][key].join(', ');
+	}
+
+	/**
+  * Iterate over all headers
+  *
+  * @param   Function  callback  Executed for each item with parameters (value, name, thisArg)
+  * @param   Boolean   thisArg   `this` context for callback function
+  * @return  Void
+  */
+	forEach(callback) {
+		let thisArg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : undefined;
+
+		let pairs = getHeaders(this);
+		let i = 0;
+		while (i < pairs.length) {
+			var _pairs$i = pairs[i];
+			const name = _pairs$i[0],
+			      value = _pairs$i[1];
+
+			callback.call(thisArg, value, name, this);
+			pairs = getHeaders(this);
+			i++;
+		}
+	}
+
+	/**
+  * Overwrite header values given name
+  *
+  * @param   String  name   Header name
+  * @param   String  value  Header value
+  * @return  Void
+  */
+	set(name, value) {
+		name = `${name}`;
+		value = `${value}`;
+		validateName(name);
+		validateValue(value);
+		const key = find(this[MAP], name);
+		this[MAP][key !== undefined ? key : name] = [value];
+	}
+
+	/**
+  * Append a value onto existing header
+  *
+  * @param   String  name   Header name
+  * @param   String  value  Header value
+  * @return  Void
+  */
+	append(name, value) {
+		name = `${name}`;
+		value = `${value}`;
+		validateName(name);
+		validateValue(value);
+		const key = find(this[MAP], name);
+		if (key !== undefined) {
+			this[MAP][key].push(value);
+		} else {
+			this[MAP][name] = [value];
+		}
+	}
+
+	/**
+  * Check for header name existence
+  *
+  * @param   String   name  Header name
+  * @return  Boolean
+  */
+	has(name) {
+		name = `${name}`;
+		validateName(name);
+		return find(this[MAP], name) !== undefined;
+	}
+
+	/**
+  * Delete all header values given name
+  *
+  * @param   String  name  Header name
+  * @return  Void
+  */
+	delete(name) {
+		name = `${name}`;
+		validateName(name);
+		const key = find(this[MAP], name);
+		if (key !== undefined) {
+			delete this[MAP][key];
+		}
+	}
+
+	/**
+  * Return raw headers (non-spec api)
+  *
+  * @return  Object
+  */
+	raw() {
+		return this[MAP];
+	}
+
+	/**
+  * Get an iterator on keys.
+  *
+  * @return  Iterator
+  */
+	keys() {
+		return createHeadersIterator(this, 'key');
+	}
+
+	/**
+  * Get an iterator on values.
+  *
+  * @return  Iterator
+  */
+	values() {
+		return createHeadersIterator(this, 'value');
+	}
+
+	/**
+  * Get an iterator on entries.
+  *
+  * This is the default iterator of the Headers object.
+  *
+  * @return  Iterator
+  */
+	[Symbol.iterator]() {
+		return createHeadersIterator(this, 'key+value');
+	}
+}
+Headers.prototype.entries = Headers.prototype[Symbol.iterator];
+
+Object.defineProperty(Headers.prototype, Symbol.toStringTag, {
+	value: 'Headers',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+Object.defineProperties(Headers.prototype, {
+	get: { enumerable: true },
+	forEach: { enumerable: true },
+	set: { enumerable: true },
+	append: { enumerable: true },
+	has: { enumerable: true },
+	delete: { enumerable: true },
+	keys: { enumerable: true },
+	values: { enumerable: true },
+	entries: { enumerable: true }
+});
+
+function getHeaders(headers) {
+	let kind = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'key+value';
+
+	const keys = Object.keys(headers[MAP]).sort();
+	return keys.map(kind === 'key' ? function (k) {
+		return k.toLowerCase();
+	} : kind === 'value' ? function (k) {
+		return headers[MAP][k].join(', ');
+	} : function (k) {
+		return [k.toLowerCase(), headers[MAP][k].join(', ')];
+	});
+}
+
+const INTERNAL = Symbol('internal');
+
+function createHeadersIterator(target, kind) {
+	const iterator = Object.create(HeadersIteratorPrototype);
+	iterator[INTERNAL] = {
+		target,
+		kind,
+		index: 0
+	};
+	return iterator;
+}
+
+const HeadersIteratorPrototype = Object.setPrototypeOf({
+	next() {
+		// istanbul ignore if
+		if (!this || Object.getPrototypeOf(this) !== HeadersIteratorPrototype) {
+			throw new TypeError('Value of `this` is not a HeadersIterator');
+		}
+
+		var _INTERNAL = this[INTERNAL];
+		const target = _INTERNAL.target,
+		      kind = _INTERNAL.kind,
+		      index = _INTERNAL.index;
+
+		const values = getHeaders(target, kind);
+		const len = values.length;
+		if (index >= len) {
+			return {
+				value: undefined,
+				done: true
+			};
+		}
+
+		this[INTERNAL].index = index + 1;
+
+		return {
+			value: values[index],
+			done: false
+		};
+	}
+}, Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]())));
+
+Object.defineProperty(HeadersIteratorPrototype, Symbol.toStringTag, {
+	value: 'HeadersIterator',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+/**
+ * Export the Headers object in a form that Node.js can consume.
+ *
+ * @param   Headers  headers
+ * @return  Object
+ */
+function exportNodeCompatibleHeaders(headers) {
+	const obj = Object.assign({ __proto__: null }, headers[MAP]);
+
+	// http.request() only supports string as Host header. This hack makes
+	// specifying custom Host header possible.
+	const hostHeaderKey = find(headers[MAP], 'Host');
+	if (hostHeaderKey !== undefined) {
+		obj[hostHeaderKey] = obj[hostHeaderKey][0];
+	}
+
+	return obj;
+}
+
+/**
+ * Create a Headers object from an object of headers, ignoring those that do
+ * not conform to HTTP grammar productions.
+ *
+ * @param   Object  obj  Object of headers
+ * @return  Headers
+ */
+function createHeadersLenient(obj) {
+	const headers = new Headers();
+	for (const name of Object.keys(obj)) {
+		if (invalidTokenRegex.test(name)) {
+			continue;
+		}
+		if (Array.isArray(obj[name])) {
+			for (const val of obj[name]) {
+				if (invalidHeaderCharRegex.test(val)) {
+					continue;
+				}
+				if (headers[MAP][name] === undefined) {
+					headers[MAP][name] = [val];
+				} else {
+					headers[MAP][name].push(val);
+				}
+			}
+		} else if (!invalidHeaderCharRegex.test(obj[name])) {
+			headers[MAP][name] = [obj[name]];
+		}
+	}
+	return headers;
+}
+
+const INTERNALS$1 = Symbol('Response internals');
+
+// fix an issue where "STATUS_CODES" aren't a named export for node <10
+const STATUS_CODES = http.STATUS_CODES;
+
+/**
+ * Response class
+ *
+ * @param   Stream  body  Readable stream
+ * @param   Object  opts  Response options
+ * @return  Void
+ */
+class Response {
+	constructor() {
+		let body = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : null;
+		let opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+		Body.call(this, body, opts);
+
+		const status = opts.status || 200;
+		const headers = new Headers(opts.headers);
+
+		if (body != null && !headers.has('Content-Type')) {
+			const contentType = extractContentType(body);
+			if (contentType) {
+				headers.append('Content-Type', contentType);
+			}
+		}
+
+		this[INTERNALS$1] = {
+			url: opts.url,
+			status,
+			statusText: opts.statusText || STATUS_CODES[status],
+			headers,
+			counter: opts.counter
+		};
+	}
+
+	get url() {
+		return this[INTERNALS$1].url || '';
+	}
+
+	get status() {
+		return this[INTERNALS$1].status;
+	}
+
+	/**
+  * Convenience property representing if the request ended normally
+  */
+	get ok() {
+		return this[INTERNALS$1].status >= 200 && this[INTERNALS$1].status < 300;
+	}
+
+	get redirected() {
+		return this[INTERNALS$1].counter > 0;
+	}
+
+	get statusText() {
+		return this[INTERNALS$1].statusText;
+	}
+
+	get headers() {
+		return this[INTERNALS$1].headers;
+	}
+
+	/**
+  * Clone this response
+  *
+  * @return  Response
+  */
+	clone() {
+		return new Response(clone(this), {
+			url: this.url,
+			status: this.status,
+			statusText: this.statusText,
+			headers: this.headers,
+			ok: this.ok,
+			redirected: this.redirected
+		});
+	}
+}
+
+Body.mixIn(Response.prototype);
+
+Object.defineProperties(Response.prototype, {
+	url: { enumerable: true },
+	status: { enumerable: true },
+	ok: { enumerable: true },
+	redirected: { enumerable: true },
+	statusText: { enumerable: true },
+	headers: { enumerable: true },
+	clone: { enumerable: true }
+});
+
+Object.defineProperty(Response.prototype, Symbol.toStringTag, {
+	value: 'Response',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+const INTERNALS$2 = Symbol('Request internals');
+const URL = Url.URL || whatwgUrl.URL;
+
+// fix an issue where "format", "parse" aren't a named export for node <10
+const parse_url = Url.parse;
+const format_url = Url.format;
+
+/**
+ * Wrapper around `new URL` to handle arbitrary URLs
+ *
+ * @param  {string} urlStr
+ * @return {void}
+ */
+function parseURL(urlStr) {
+	/*
+ 	Check whether the URL is absolute or not
+ 		Scheme: https://tools.ietf.org/html/rfc3986#section-3.1
+ 	Absolute URL: https://tools.ietf.org/html/rfc3986#section-4.3
+ */
+	if (/^[a-zA-Z][a-zA-Z\d+\-.]*:/.exec(urlStr)) {
+		urlStr = new URL(urlStr).toString();
+	}
+
+	// Fallback to old implementation for arbitrary URLs
+	return parse_url(urlStr);
+}
+
+const streamDestructionSupported = 'destroy' in Stream.Readable.prototype;
+
+/**
+ * Check if a value is an instance of Request.
+ *
+ * @param   Mixed   input
+ * @return  Boolean
+ */
+function isRequest(input) {
+	return typeof input === 'object' && typeof input[INTERNALS$2] === 'object';
+}
+
+function isAbortSignal(signal) {
+	const proto = signal && typeof signal === 'object' && Object.getPrototypeOf(signal);
+	return !!(proto && proto.constructor.name === 'AbortSignal');
+}
+
+/**
+ * Request class
+ *
+ * @param   Mixed   input  Url or Request instance
+ * @param   Object  init   Custom options
+ * @return  Void
+ */
+class Request {
+	constructor(input) {
+		let init = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+		let parsedURL;
+
+		// normalize input
+		if (!isRequest(input)) {
+			if (input && input.href) {
+				// in order to support Node.js' Url objects; though WHATWG's URL objects
+				// will fall into this branch also (since their `toString()` will return
+				// `href` property anyway)
+				parsedURL = parseURL(input.href);
+			} else {
+				// coerce input to a string before attempting to parse
+				parsedURL = parseURL(`${input}`);
+			}
+			input = {};
+		} else {
+			parsedURL = parseURL(input.url);
+		}
+
+		let method = init.method || input.method || 'GET';
+		method = method.toUpperCase();
+
+		if ((init.body != null || isRequest(input) && input.body !== null) && (method === 'GET' || method === 'HEAD')) {
+			throw new TypeError('Request with GET/HEAD method cannot have body');
+		}
+
+		let inputBody = init.body != null ? init.body : isRequest(input) && input.body !== null ? clone(input) : null;
+
+		Body.call(this, inputBody, {
+			timeout: init.timeout || input.timeout || 0,
+			size: init.size || input.size || 0
+		});
+
+		const headers = new Headers(init.headers || input.headers || {});
+
+		if (inputBody != null && !headers.has('Content-Type')) {
+			const contentType = extractContentType(inputBody);
+			if (contentType) {
+				headers.append('Content-Type', contentType);
+			}
+		}
+
+		let signal = isRequest(input) ? input.signal : null;
+		if ('signal' in init) signal = init.signal;
+
+		if (signal != null && !isAbortSignal(signal)) {
+			throw new TypeError('Expected signal to be an instanceof AbortSignal');
+		}
+
+		this[INTERNALS$2] = {
+			method,
+			redirect: init.redirect || input.redirect || 'follow',
+			headers,
+			parsedURL,
+			signal
+		};
+
+		// node-fetch-only options
+		this.follow = init.follow !== undefined ? init.follow : input.follow !== undefined ? input.follow : 20;
+		this.compress = init.compress !== undefined ? init.compress : input.compress !== undefined ? input.compress : true;
+		this.counter = init.counter || input.counter || 0;
+		this.agent = init.agent || input.agent;
+	}
+
+	get method() {
+		return this[INTERNALS$2].method;
+	}
+
+	get url() {
+		return format_url(this[INTERNALS$2].parsedURL);
+	}
+
+	get headers() {
+		return this[INTERNALS$2].headers;
+	}
+
+	get redirect() {
+		return this[INTERNALS$2].redirect;
+	}
+
+	get signal() {
+		return this[INTERNALS$2].signal;
+	}
+
+	/**
+  * Clone this request
+  *
+  * @return  Request
+  */
+	clone() {
+		return new Request(this);
+	}
+}
+
+Body.mixIn(Request.prototype);
+
+Object.defineProperty(Request.prototype, Symbol.toStringTag, {
+	value: 'Request',
+	writable: false,
+	enumerable: false,
+	configurable: true
+});
+
+Object.defineProperties(Request.prototype, {
+	method: { enumerable: true },
+	url: { enumerable: true },
+	headers: { enumerable: true },
+	redirect: { enumerable: true },
+	clone: { enumerable: true },
+	signal: { enumerable: true }
+});
+
+/**
+ * Convert a Request to Node.js http request options.
+ *
+ * @param   Request  A Request instance
+ * @return  Object   The options object to be passed to http.request
+ */
+function getNodeRequestOptions(request) {
+	const parsedURL = request[INTERNALS$2].parsedURL;
+	const headers = new Headers(request[INTERNALS$2].headers);
+
+	// fetch step 1.3
+	if (!headers.has('Accept')) {
+		headers.set('Accept', '*/*');
+	}
+
+	// Basic fetch
+	if (!parsedURL.protocol || !parsedURL.hostname) {
+		throw new TypeError('Only absolute URLs are supported');
+	}
+
+	if (!/^https?:$/.test(parsedURL.protocol)) {
+		throw new TypeError('Only HTTP(S) protocols are supported');
+	}
+
+	if (request.signal && request.body instanceof Stream.Readable && !streamDestructionSupported) {
+		throw new Error('Cancellation of streamed requests with AbortSignal is not supported in node < 8');
+	}
+
+	// HTTP-network-or-cache fetch steps 2.4-2.7
+	let contentLengthValue = null;
+	if (request.body == null && /^(POST|PUT)$/i.test(request.method)) {
+		contentLengthValue = '0';
+	}
+	if (request.body != null) {
+		const totalBytes = getTotalBytes(request);
+		if (typeof totalBytes === 'number') {
+			contentLengthValue = String(totalBytes);
+		}
+	}
+	if (contentLengthValue) {
+		headers.set('Content-Length', contentLengthValue);
+	}
+
+	// HTTP-network-or-cache fetch step 2.11
+	if (!headers.has('User-Agent')) {
+		headers.set('User-Agent', 'node-fetch/1.0 (+https://github.com/bitinn/node-fetch)');
+	}
+
+	// HTTP-network-or-cache fetch step 2.15
+	if (request.compress && !headers.has('Accept-Encoding')) {
+		headers.set('Accept-Encoding', 'gzip,deflate');
+	}
+
+	let agent = request.agent;
+	if (typeof agent === 'function') {
+		agent = agent(parsedURL);
+	}
+
+	if (!headers.has('Connection') && !agent) {
+		headers.set('Connection', 'close');
+	}
+
+	// HTTP-network fetch step 4.2
+	// chunked encoding is handled by Node.js
+
+	return Object.assign({}, parsedURL, {
+		method: request.method,
+		headers: exportNodeCompatibleHeaders(headers),
+		agent
+	});
+}
+
+/**
+ * abort-error.js
+ *
+ * AbortError interface for cancelled requests
+ */
+
+/**
+ * Create AbortError instance
+ *
+ * @param   String      message      Error message for human
+ * @return  AbortError
+ */
+function AbortError(message) {
+  Error.call(this, message);
+
+  this.type = 'aborted';
+  this.message = message;
+
+  // hide custom error implementation details from end-users
+  Error.captureStackTrace(this, this.constructor);
+}
+
+AbortError.prototype = Object.create(Error.prototype);
+AbortError.prototype.constructor = AbortError;
+AbortError.prototype.name = 'AbortError';
+
+const URL$1 = Url.URL || whatwgUrl.URL;
+
+// fix an issue where "PassThrough", "resolve" aren't a named export for node <10
+const PassThrough$1 = Stream.PassThrough;
+
+const isDomainOrSubdomain = function isDomainOrSubdomain(destination, original) {
+	const orig = new URL$1(original).hostname;
+	const dest = new URL$1(destination).hostname;
+
+	return orig === dest || orig[orig.length - dest.length - 1] === '.' && orig.endsWith(dest);
+};
+
+/**
+ * Fetch function
+ *
+ * @param   Mixed    url   Absolute url or Request instance
+ * @param   Object   opts  Fetch options
+ * @return  Promise
+ */
+function fetch(url, opts) {
+
+	// allow custom promise
+	if (!fetch.Promise) {
+		throw new Error('native promise missing, set fetch.Promise to your favorite alternative');
+	}
+
+	Body.Promise = fetch.Promise;
+
+	// wrap http.request into fetch
+	return new fetch.Promise(function (resolve, reject) {
+		// build request object
+		const request = new Request(url, opts);
+		const options = getNodeRequestOptions(request);
+
+		const send = (options.protocol === 'https:' ? https : http).request;
+		const signal = request.signal;
+
+		let response = null;
+
+		const abort = function abort() {
+			let error = new AbortError('The user aborted a request.');
+			reject(error);
+			if (request.body && request.body instanceof Stream.Readable) {
+				request.body.destroy(error);
+			}
+			if (!response || !response.body) return;
+			response.body.emit('error', error);
+		};
+
+		if (signal && signal.aborted) {
+			abort();
+			return;
+		}
+
+		const abortAndFinalize = function abortAndFinalize() {
+			abort();
+			finalize();
+		};
+
+		// send request
+		const req = send(options);
+		let reqTimeout;
+
+		if (signal) {
+			signal.addEventListener('abort', abortAndFinalize);
+		}
+
+		function finalize() {
+			req.abort();
+			if (signal) signal.removeEventListener('abort', abortAndFinalize);
+			clearTimeout(reqTimeout);
+		}
+
+		if (request.timeout) {
+			req.once('socket', function (socket) {
+				reqTimeout = setTimeout(function () {
+					reject(new FetchError(`network timeout at: ${request.url}`, 'request-timeout'));
+					finalize();
+				}, request.timeout);
+			});
+		}
+
+		req.on('error', function (err) {
+			reject(new FetchError(`request to ${request.url} failed, reason: ${err.message}`, 'system', err));
+			finalize();
+		});
+
+		req.on('response', function (res) {
+			clearTimeout(reqTimeout);
+
+			const headers = createHeadersLenient(res.headers);
+
+			// HTTP fetch step 5
+			if (fetch.isRedirect(res.statusCode)) {
+				// HTTP fetch step 5.2
+				const location = headers.get('Location');
+
+				// HTTP fetch step 5.3
+				let locationURL = null;
+				try {
+					locationURL = location === null ? null : new URL$1(location, request.url).toString();
+				} catch (err) {
+					// error here can only be invalid URL in Location: header
+					// do not throw when options.redirect == manual
+					// let the user extract the errorneous redirect URL
+					if (request.redirect !== 'manual') {
+						reject(new FetchError(`uri requested responds with an invalid redirect URL: ${location}`, 'invalid-redirect'));
+						finalize();
+						return;
+					}
+				}
+
+				// HTTP fetch step 5.5
+				switch (request.redirect) {
+					case 'error':
+						reject(new FetchError(`uri requested responds with a redirect, redirect mode is set to error: ${request.url}`, 'no-redirect'));
+						finalize();
+						return;
+					case 'manual':
+						// node-fetch-specific step: make manual redirect a bit easier to use by setting the Location header value to the resolved URL.
+						if (locationURL !== null) {
+							// handle corrupted header
+							try {
+								headers.set('Location', locationURL);
+							} catch (err) {
+								// istanbul ignore next: nodejs server prevent invalid response headers, we can't test this through normal request
+								reject(err);
+							}
+						}
+						break;
+					case 'follow':
+						// HTTP-redirect fetch step 2
+						if (locationURL === null) {
+							break;
+						}
+
+						// HTTP-redirect fetch step 5
+						if (request.counter >= request.follow) {
+							reject(new FetchError(`maximum redirect reached at: ${request.url}`, 'max-redirect'));
+							finalize();
+							return;
+						}
+
+						// HTTP-redirect fetch step 6 (counter increment)
+						// Create a new Request object.
+						const requestOpts = {
+							headers: new Headers(request.headers),
+							follow: request.follow,
+							counter: request.counter + 1,
+							agent: request.agent,
+							compress: request.compress,
+							method: request.method,
+							body: request.body,
+							signal: request.signal,
+							timeout: request.timeout,
+							size: request.size
+						};
+
+						if (!isDomainOrSubdomain(request.url, locationURL)) {
+							for (const name of ['authorization', 'www-authenticate', 'cookie', 'cookie2']) {
+								requestOpts.headers.delete(name);
+							}
+						}
+
+						// HTTP-redirect fetch step 9
+						if (res.statusCode !== 303 && request.body && getTotalBytes(request) === null) {
+							reject(new FetchError('Cannot follow redirect with body being a readable stream', 'unsupported-redirect'));
+							finalize();
+							return;
+						}
+
+						// HTTP-redirect fetch step 11
+						if (res.statusCode === 303 || (res.statusCode === 301 || res.statusCode === 302) && request.method === 'POST') {
+							requestOpts.method = 'GET';
+							requestOpts.body = undefined;
+							requestOpts.headers.delete('content-length');
+						}
+
+						// HTTP-redirect fetch step 15
+						resolve(fetch(new Request(locationURL, requestOpts)));
+						finalize();
+						return;
+				}
+			}
+
+			// prepare response
+			res.once('end', function () {
+				if (signal) signal.removeEventListener('abort', abortAndFinalize);
+			});
+			let body = res.pipe(new PassThrough$1());
+
+			const response_options = {
+				url: request.url,
+				status: res.statusCode,
+				statusText: res.statusMessage,
+				headers: headers,
+				size: request.size,
+				timeout: request.timeout,
+				counter: request.counter
+			};
+
+			// HTTP-network fetch step 12.1.1.3
+			const codings = headers.get('Content-Encoding');
+
+			// HTTP-network fetch step 12.1.1.4: handle content codings
+
+			// in following scenarios we ignore compression support
+			// 1. compression support is disabled
+			// 2. HEAD request
+			// 3. no Content-Encoding header
+			// 4. no content response (204)
+			// 5. content not modified response (304)
+			if (!request.compress || request.method === 'HEAD' || codings === null || res.statusCode === 204 || res.statusCode === 304) {
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// For Node v6+
+			// Be less strict when decoding compressed responses, since sometimes
+			// servers send slightly invalid responses that are still accepted
+			// by common browsers.
+			// Always using Z_SYNC_FLUSH is what cURL does.
+			const zlibOptions = {
+				flush: zlib.Z_SYNC_FLUSH,
+				finishFlush: zlib.Z_SYNC_FLUSH
+			};
+
+			// for gzip
+			if (codings == 'gzip' || codings == 'x-gzip') {
+				body = body.pipe(zlib.createGunzip(zlibOptions));
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// for deflate
+			if (codings == 'deflate' || codings == 'x-deflate') {
+				// handle the infamous raw deflate response from old servers
+				// a hack for old IIS and Apache servers
+				const raw = res.pipe(new PassThrough$1());
+				raw.once('data', function (chunk) {
+					// see http://stackoverflow.com/questions/37519828
+					if ((chunk[0] & 0x0F) === 0x08) {
+						body = body.pipe(zlib.createInflate());
+					} else {
+						body = body.pipe(zlib.createInflateRaw());
+					}
+					response = new Response(body, response_options);
+					resolve(response);
+				});
+				return;
+			}
+
+			// for br
+			if (codings == 'br' && typeof zlib.createBrotliDecompress === 'function') {
+				body = body.pipe(zlib.createBrotliDecompress());
+				response = new Response(body, response_options);
+				resolve(response);
+				return;
+			}
+
+			// otherwise, use response as-is
+			response = new Response(body, response_options);
+			resolve(response);
+		});
+
+		writeToStream(req, request);
+	});
+}
+/**
+ * Redirect code matching
+ *
+ * @param   Number   code  Status code
+ * @return  Boolean
+ */
+fetch.isRedirect = function (code) {
+	return code === 301 || code === 302 || code === 303 || code === 307 || code === 308;
+};
+
+// expose Promise
+fetch.Promise = global.Promise;
+
+export default fetch;
+export { Headers, Request, Response, FetchError };

+{
+    "name": "node-fetch",
+    "version": "2.6.7",
+    "description": "A light-weight module that brings window.fetch to node.js",
+    "main": "lib/index.js",
+    "browser": "./browser.js",
+    "module": "lib/index.mjs",
+    "files": [
+        "lib/index.js",
+        "lib/index.mjs",
+        "lib/index.es.js",
+        "browser.js"
+    ],
+    "engines": {
+        "node": "4.x || >=6.0.0"
+    },
+    "scripts": {
+        "build": "cross-env BABEL_ENV=rollup rollup -c",
+        "prepare": "npm run build",
+        "test": "cross-env BABEL_ENV=test mocha --require babel-register --throw-deprecation test/test.js",
+        "report": "cross-env BABEL_ENV=coverage nyc --reporter lcov --reporter text mocha -R spec test/test.js",
+        "coverage": "cross-env BABEL_ENV=coverage nyc --reporter json --reporter text mocha -R spec test/test.js && codecov -f coverage/coverage-final.json"
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/bitinn/node-fetch.git"
+    },
+    "keywords": [
+        "fetch",
+        "http",
+        "promise"
+    ],
+    "author": "David Frank",
+    "license": "MIT",
+    "bugs": {
+        "url": "https://github.com/bitinn/node-fetch/issues"
+    },
+    "homepage": "https://github.com/bitinn/node-fetch",
+    "dependencies": {
+        "whatwg-url": "^5.0.0"
+    },
+    "peerDependencies": { 
+        "encoding": "^0.1.0"
+    },
+    "peerDependenciesMeta": {
+        "encoding": {
+            "optional": true
+        }
+    },
+    "devDependencies": {
+        "@ungap/url-search-params": "^0.1.2",
+        "abort-controller": "^1.1.0",
+        "abortcontroller-polyfill": "^1.3.0",
+        "babel-core": "^6.26.3",
+        "babel-plugin-istanbul": "^4.1.6",
+        "babel-preset-env": "^1.6.1",
+        "babel-register": "^6.16.3",
+        "chai": "^3.5.0",
+        "chai-as-promised": "^7.1.1",
+        "chai-iterator": "^1.1.1",
+        "chai-string": "~1.3.0",
+        "codecov": "3.3.0",
+        "cross-env": "^5.2.0",
+        "form-data": "^2.3.3",
+        "is-builtin-module": "^1.0.0",
+        "mocha": "^5.0.0",
+        "nyc": "11.9.0",
+        "parted": "^0.1.1",
+        "promise": "^8.0.3",
+        "resumer": "0.0.0",
+        "rollup": "^0.63.4",
+        "rollup-plugin-babel": "^3.0.7",
+        "string-to-arraybuffer": "^1.0.2",
+        "teeny-request": "3.7.0"
+    }
+}

+Copyright (c) 2013, Deoxxa Development
+======================================
+All rights reserved.
+--------------------
+  
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:  
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.  
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.  
+3. Neither the name of Deoxxa Development nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.  
+  
+THIS SOFTWARE IS PROVIDED BY DEOXXA DEVELOPMENT ''AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL DEOXXA DEVELOPMENT BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+# duplexer3 [![Build Status](https://travis-ci.org/floatdrop/duplexer3.svg?branch=master)](https://travis-ci.org/floatdrop/duplexer3) [![Coverage Status](https://coveralls.io/repos/floatdrop/duplexer3/badge.svg?branch=master&service=github)](https://coveralls.io/github/floatdrop/duplexer3?branch=master)
+
+Like [duplexer2](https://github.com/deoxxa/duplexer2) but using Streams3 without readable-stream dependency
+
+```javascript
+var stream = require("stream");
+
+var duplexer3 = require("duplexer3");
+
+var writable = new stream.Writable({objectMode: true}),
+    readable = new stream.Readable({objectMode: true});
+
+writable._write = function _write(input, encoding, done) {
+  if (readable.push(input)) {
+    return done();
+  } else {
+    readable.once("drain", done);
+  }
+};
+
+readable._read = function _read(n) {
+  // no-op
+};
+
+// simulate the readable thing closing after a bit
+writable.once("finish", function() {
+  setTimeout(function() {
+    readable.push(null);
+  }, 500);
+});
+
+var duplex = duplexer3(writable, readable);
+
+duplex.on("data", function(e) {
+  console.log("got data", JSON.stringify(e));
+});
+
+duplex.on("finish", function() {
+  console.log("got finish event");
+});
+
+duplex.on("end", function() {
+  console.log("got end event");
+});
+
+duplex.write("oh, hi there", function() {
+  console.log("finished writing");
+});
+
+duplex.end(function() {
+  console.log("finished ending");
+});
+```
+
+```
+got data "oh, hi there"
+finished writing
+got finish event
+finished ending
+got end event
+```
+
+## Overview
+
+This is a reimplementation of [duplexer](https://www.npmjs.com/package/duplexer) using the
+Streams3 API which is standard in Node as of v4. Everything largely
+works the same.
+
+
+
+## Installation
+
+[Available via `npm`](https://docs.npmjs.com/cli/install):
+
+```
+$ npm i duplexer3
+```
+
+## API
+
+### duplexer3
+
+Creates a new `DuplexWrapper` object, which is the actual class that implements
+most of the fun stuff. All that fun stuff is hidden. DON'T LOOK.
+
+```javascript
+duplexer3([options], writable, readable)
+```
+
+```javascript
+const duplex = duplexer3(new stream.Writable(), new stream.Readable());
+```
+
+Arguments
+
+* __options__ - an object specifying the regular `stream.Duplex` options, as
+  well as the properties described below.
+* __writable__ - a writable stream
+* __readable__ - a readable stream
+
+Options
+
+* __bubbleErrors__ - a boolean value that specifies whether to bubble errors
+  from the underlying readable/writable streams. Default is `true`.
+
+
+## License
+
+3-clause BSD. [A copy](./LICENSE) is included with the source.
+
+## Contact
+
+* GitHub ([deoxxa](http://github.com/deoxxa))
+* Twitter ([@deoxxa](http://twitter.com/deoxxa))
+* Email ([deoxxa@fknsrs.biz](mailto:deoxxa@fknsrs.biz))

+"use strict";
+
+var stream = require("stream");
+
+function DuplexWrapper(options, writable, readable) {
+  if (typeof readable === "undefined") {
+    readable = writable;
+    writable = options;
+    options = null;
+  }
+
+  stream.Duplex.call(this, options);
+
+  if (typeof readable.read !== "function") {
+    readable = (new stream.Readable(options)).wrap(readable);
+  }
+
+  this._writable = writable;
+  this._readable = readable;
+  this._waiting = false;
+
+  var self = this;
+
+  writable.once("finish", function() {
+    self.end();
+  });
+
+  this.once("finish", function() {
+    writable.end();
+  });
+
+  readable.on("readable", function() {
+    if (self._waiting) {
+      self._waiting = false;
+      self._read();
+    }
+  });
+
+  readable.once("end", function() {
+    self.push(null);
+  });
+
+  if (!options || typeof options.bubbleErrors === "undefined" || options.bubbleErrors) {
+    writable.on("error", function(err) {
+      self.emit("error", err);
+    });
+
+    readable.on("error", function(err) {
+      self.emit("error", err);
+    });
+  }
+}
+
+DuplexWrapper.prototype = Object.create(stream.Duplex.prototype, {constructor: {value: DuplexWrapper}});
+
+DuplexWrapper.prototype._write = function _write(input, encoding, done) {
+  this._writable.write(input, encoding, done);
+};
+
+DuplexWrapper.prototype._read = function _read() {
+  var buf;
+  var reads = 0;
+  while ((buf = this._readable.read()) !== null) {
+    this.push(buf);
+    reads++;
+  }
+  if (reads === 0) {
+    this._waiting = true;
+  }
+};
+
+module.exports = function duplex2(options, writable, readable) {
+  return new DuplexWrapper(options, writable, readable);
+};
+
+module.exports.DuplexWrapper = DuplexWrapper;

+{
+  "name": "duplexer3",
+  "version": "0.1.4",
+  "description": "Like duplexer but using streams3",
+  "engine": {
+      "node": ">=4"
+  },
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "mocha -R tap"
+  },
+  "repository": "floatdrop/duplexer3",
+  "keywords": [
+    "duplex",
+    "duplexer",
+    "stream",
+    "stream3",
+    "join",
+    "combine"
+  ],
+  "author": "Conrad Pankoff <deoxxa@fknsrs.biz> (http://www.fknsrs.biz/)",
+  "license": "BSD-3-Clause",
+  "devDependencies": {
+    "mocha": "^2.2.5"
+  }
+}

+The MIT License (MIT)
+
+Copyright (c) 2014 Arnout Kazemier
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

+# EventEmitter3
+
+[![Version npm](https://img.shields.io/npm/v/eventemitter3.svg?style=flat-square)](http://browsenpm.org/package/eventemitter3)[![Build Status](https://img.shields.io/travis/primus/eventemitter3/master.svg?style=flat-square)](https://travis-ci.org/primus/eventemitter3)[![Dependencies](https://img.shields.io/david/primus/eventemitter3.svg?style=flat-square)](https://david-dm.org/primus/eventemitter3)[![Coverage Status](https://img.shields.io/coveralls/primus/eventemitter3/master.svg?style=flat-square)](https://coveralls.io/r/primus/eventemitter3?branch=master)[![IRC channel](https://img.shields.io/badge/IRC-irc.freenode.net%23primus-00a8ff.svg?style=flat-square)](https://webchat.freenode.net/?channels=primus)
+
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/eventemitter3.svg)](https://saucelabs.com/u/eventemitter3)
+
+EventEmitter3 is a high performance EventEmitter. It has been micro-optimized
+for various of code paths making this, one of, if not the fastest EventEmitter
+available for Node.js and browsers. The module is API compatible with the
+EventEmitter that ships by default with Node.js but there are some slight
+differences:
+
+- Domain support has been removed.
+- We do not `throw` an error when you emit an `error` event and nobody is
+  listening.
+- The `newListener` event is removed as the use-cases for this functionality are
+  really just edge cases.
+- No `setMaxListeners` and it's pointless memory leak warnings. If you want to
+  add `end` listeners you should be able to do that without modules complaining.
+- No `listenerCount` function. Use `EE.listeners(event).length` instead.
+- Support for custom context for events so there is no need to use `fn.bind`.
+- `listeners` method can do existence checking instead of returning only arrays.
+
+It's a drop in replacement for existing EventEmitters, but just faster. Free
+performance, who wouldn't want that? The EventEmitter is written in EcmaScript 3
+so it will work in the oldest browsers and node versions that you need to
+support.
+
+## Installation
+
+```bash
+$ npm install --save eventemitter3        # npm
+$ component install primus/eventemitter3  # Component
+$ bower install eventemitter3             # Bower
+```
+
+## Usage
+
+After installation the only thing you need to do is require the module:
+
+```js
+var EventEmitter = require('eventemitter3');
+```
+
+And you're ready to create your own EventEmitter instances. For the API
+documentation, please follow the official Node.js documentation:
+
+http://nodejs.org/api/events.html
+
+### Contextual emits
+
+We've upgraded the API of the `EventEmitter.on`, `EventEmitter.once` and
+`EventEmitter.removeListener` to accept an extra argument which is the `context`
+or `this` value that should be set for the emitted events. This means you no
+longer have the overhead of an event that required `fn.bind` in order to get a
+custom `this` value.
+
+```js
+var EE = new EventEmitter()
+  , context = { foo: 'bar' };
+
+function emitted() {
+  console.log(this === context); // true
+}
+
+EE.once('event-name', emitted, context);
+EE.on('another-event', emitted, context);
+EE.removeListener('another-event', emitted, context);
+```
+
+### Existence
+
+To check if there is already a listener for a given event you can supply the
+`listeners` method with an extra boolean argument. This will transform the
+output from an array, to a boolean value which indicates if there are listeners
+in place for the given event:
+
+```js
+var EE = new EventEmitter();
+EE.once('event-name', function () {});
+EE.on('another-event', function () {});
+
+EE.listeners('event-name', true); // returns true
+EE.listeners('unknown-name', true); // returns false
+```
+
+## License
+
+[MIT](LICENSE)

+'use strict';
+
+var has = Object.prototype.hasOwnProperty;
+
+//
+// We store our EE objects in a plain object whose properties are event names.
+// If `Object.create(null)` is not supported we prefix the event names with a
+// `~` to make sure that the built-in object properties are not overridden or
+// used as an attack vector.
+// We also assume that `Object.create(null)` is available when the event name
+// is an ES6 Symbol.
+//
+var prefix = typeof Object.create !== 'function' ? '~' : false;
+
+/**
+ * Representation of a single EventEmitter function.
+ *
+ * @param {Function} fn Event handler to be called.
+ * @param {Mixed} context Context for function execution.
+ * @param {Boolean} [once=false] Only emit once
+ * @api private
+ */
+function EE(fn, context, once) {
+  this.fn = fn;
+  this.context = context;
+  this.once = once || false;
+}
+
+/**
+ * Minimal EventEmitter interface that is molded against the Node.js
+ * EventEmitter interface.
+ *
+ * @constructor
+ * @api public
+ */
+function EventEmitter() { /* Nothing to set */ }
+
+/**
+ * Hold the assigned EventEmitters by name.
+ *
+ * @type {Object}
+ * @private
+ */
+EventEmitter.prototype._events = undefined;
+
+/**
+ * Return an array listing the events for which the emitter has registered
+ * listeners.
+ *
+ * @returns {Array}
+ * @api public
+ */
+EventEmitter.prototype.eventNames = function eventNames() {
+  var events = this._events
+    , names = []
+    , name;
+
+  if (!events) return names;
+
+  for (name in events) {
+    if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
+  }
+
+  if (Object.getOwnPropertySymbols) {
+    return names.concat(Object.getOwnPropertySymbols(events));
+  }
+
+  return names;
+};
+
+/**
+ * Return a list of assigned event listeners.
+ *
+ * @param {String} event The events that should be listed.
+ * @param {Boolean} exists We only need to know if there are listeners.
+ * @returns {Array|Boolean}
+ * @api public
+ */
+EventEmitter.prototype.listeners = function listeners(event, exists) {
+  var evt = prefix ? prefix + event : event
+    , available = this._events && this._events[evt];
+
+  if (exists) return !!available;
+  if (!available) return [];
+  if (available.fn) return [available.fn];
+
+  for (var i = 0, l = available.length, ee = new Array(l); i < l; i++) {
+    ee[i] = available[i].fn;
+  }
+
+  return ee;
+};
+
+/**
+ * Emit an event to all registered event listeners.
+ *
+ * @param {String} event The name of the event.
+ * @returns {Boolean} Indication if we've emitted an event.
+ * @api public
+ */
+EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
+  var evt = prefix ? prefix + event : event;
+
+  if (!this._events || !this._events[evt]) return false;
+
+  var listeners = this._events[evt]
+    , len = arguments.length
+    , args
+    , i;
+
+  if ('function' === typeof listeners.fn) {
+    if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);
+
+    switch (len) {
+      case 1: return listeners.fn.call(listeners.context), true;
+      case 2: return listeners.fn.call(listeners.context, a1), true;
+      case 3: return listeners.fn.call(listeners.context, a1, a2), true;
+      case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
+      case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
+      case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
+    }
+
+    for (i = 1, args = new Array(len -1); i < len; i++) {
+      args[i - 1] = arguments[i];
+    }
+
+    listeners.fn.apply(listeners.context, args);
+  } else {
+    var length = listeners.length
+      , j;
+
+    for (i = 0; i < length; i++) {
+      if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);
+
+      switch (len) {
+        case 1: listeners[i].fn.call(listeners[i].context); break;
+        case 2: listeners[i].fn.call(listeners[i].context, a1); break;
+        case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
+        default:
+          if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
+            args[j - 1] = arguments[j];
+          }
+
+          listeners[i].fn.apply(listeners[i].context, args);
+      }
+    }
+  }
+
+  return true;
+};
+
+/**
+ * Register a new EventListener for the given event.
+ *
+ * @param {String} event Name of the event.
+ * @param {Function} fn Callback function.
+ * @param {Mixed} [context=this] The context of the function.
+ * @api public
+ */
+EventEmitter.prototype.on = function on(event, fn, context) {
+  var listener = new EE(fn, context || this)
+    , evt = prefix ? prefix + event : event;
+
+  if (!this._events) this._events = prefix ? {} : Object.create(null);
+  if (!this._events[evt]) this._events[evt] = listener;
+  else {
+    if (!this._events[evt].fn) this._events[evt].push(listener);
+    else this._events[evt] = [
+      this._events[evt], listener
+    ];
+  }
+
+  return this;
+};
+
+/**
+ * Add an EventListener that's only called once.
+ *
+ * @param {String} event Name of the event.
+ * @param {Function} fn Callback function.
+ * @param {Mixed} [context=this] The context of the function.
+ * @api public
+ */
+EventEmitter.prototype.once = function once(event, fn, context) {
+  var listener = new EE(fn, context || this, true)
+    , evt = prefix ? prefix + event : event;
+
+  if (!this._events) this._events = prefix ? {} : Object.create(null);
+  if (!this._events[evt]) this._events[evt] = listener;
+  else {
+    if (!this._events[evt].fn) this._events[evt].push(listener);
+    else this._events[evt] = [
+      this._events[evt], listener
+    ];
+  }
+
+  return this;
+};
+
+/**
+ * Remove event listeners.
+ *
+ * @param {String} event The event we want to remove.
+ * @param {Function} fn The listener that we need to find.
+ * @param {Mixed} context Only remove listeners matching this context.
+ * @param {Boolean} once Only remove once listeners.
+ * @api public
+ */
+EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
+  var evt = prefix ? prefix + event : event;
+
+  if (!this._events || !this._events[evt]) return this;
+
+  var listeners = this._events[evt]
+    , events = [];
+
+  if (fn) {
+    if (listeners.fn) {
+      if (
+           listeners.fn !== fn
+        || (once && !listeners.once)
+        || (context && listeners.context !== context)
+      ) {
+        events.push(listeners);
+      }
+    } else {
+      for (var i = 0, length = listeners.length; i < length; i++) {
+        if (
+             listeners[i].fn !== fn
+          || (once && !listeners[i].once)
+          || (context && listeners[i].context !== context)
+        ) {
+          events.push(listeners[i]);
+        }
+      }
+    }
+  }
+
+  //
+  // Reset the array, or remove it completely if we have no more listeners.
+  //
+  if (events.length) {
+    this._events[evt] = events.length === 1 ? events[0] : events;
+  } else {
+    delete this._events[evt];
+  }
+
+  return this;
+};
+
+/**
+ * Remove all listeners or only the listeners for the specified event.
+ *
+ * @param {String} event The event want to remove all listeners for.
+ * @api public
+ */
+EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
+  if (!this._events) return this;
+
+  if (event) delete this._events[prefix ? prefix + event : event];
+  else this._events = prefix ? {} : Object.create(null);
+
+  return this;
+};
+
+//
+// Alias methods names because people roll like that.
+//
+EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+EventEmitter.prototype.addListener = EventEmitter.prototype.on;
+
+//
+// This function doesn't apply anymore.
+//
+EventEmitter.prototype.setMaxListeners = function setMaxListeners() {
+  return this;
+};
+
+//
+// Expose the prefix.
+//
+EventEmitter.prefixed = prefix;
+
+//
+// Expose the module.
+//
+if ('undefined' !== typeof module) {
+  module.exports = EventEmitter;
+}

+{
+  "name": "eventemitter3",
+  "version": "1.2.0",
+  "description": "EventEmitter3 focuses on performance while maintaining a Node.js AND browser compatible interface.",
+  "main": "index.js",
+  "scripts": {
+    "test-node": "istanbul cover _mocha --report lcovonly -- test.js",
+    "coverage": "istanbul cover _mocha -- test.js",
+    "test-browser": "zuul -- test.js",
+    "sync": "node versions.js",
+    "test": "mocha test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/primus/eventemitter3.git"
+  },
+  "keywords": [
+    "EventEmitter",
+    "EventEmitter2",
+    "EventEmitter3",
+    "Events",
+    "addEventListener",
+    "addListener",
+    "emit",
+    "emits",
+    "emitter",
+    "event",
+    "once",
+    "pub/sub",
+    "publish",
+    "reactor",
+    "subscribe"
+  ],
+  "author": "Arnout Kazemier",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/primus/eventemitter3/issues"
+  },
+  "pre-commit": "sync, test",
+  "devDependencies": {
+    "assume": "1.3.x",
+    "istanbul": "0.4.x",
+    "mocha": "2.4.x",
+    "pre-commit": "1.1.x",
+    "zuul": "3.10.x"
+  }
+}

+'use strict';
+const PassThrough = require('stream').PassThrough;
+
+module.exports = opts => {
+	opts = Object.assign({}, opts);
+
+	const array = opts.array;
+	let encoding = opts.encoding;
+	const buffer = encoding === 'buffer';
+	let objectMode = false;
+
+	if (array) {
+		objectMode = !(encoding || buffer);
+	} else {
+		encoding = encoding || 'utf8';
+	}
+
+	if (buffer) {
+		encoding = null;
+	}
+
+	let len = 0;
+	const ret = [];
+	const stream = new PassThrough({objectMode});
+
+	if (encoding) {
+		stream.setEncoding(encoding);
+	}
+
+	stream.on('data', chunk => {
+		ret.push(chunk);
+
+		if (objectMode) {
+			len = ret.length;
+		} else {
+			len += chunk.length;
+		}
+	});
+
+	stream.getBufferedValue = () => {
+		if (array) {
+			return ret;
+		}
+
+		return buffer ? Buffer.concat(ret, len) : ret.join('');
+	};
+
+	stream.getBufferedLength = () => len;
+
+	return stream;
+};

+'use strict';
+const bufferStream = require('./buffer-stream');
+
+function getStream(inputStream, opts) {
+	if (!inputStream) {
+		return Promise.reject(new Error('Expected a stream'));
+	}
+
+	opts = Object.assign({maxBuffer: Infinity}, opts);
+
+	const maxBuffer = opts.maxBuffer;
+	let stream;
+	let clean;
+
+	const p = new Promise((resolve, reject) => {
+		const error = err => {
+			if (err) { // null check
+				err.bufferedData = stream.getBufferedValue();
+			}
+
+			reject(err);
+		};
+
+		stream = bufferStream(opts);
+		inputStream.once('error', error);
+		inputStream.pipe(stream);
+
+		stream.on('data', () => {
+			if (stream.getBufferedLength() > maxBuffer) {
+				reject(new Error('maxBuffer exceeded'));
+			}
+		});
+		stream.once('error', error);
+		stream.on('end', resolve);
+
+		clean = () => {
+			// some streams doesn't implement the `stream.Readable` interface correctly
+			if (inputStream.unpipe) {
+				inputStream.unpipe(stream);
+			}
+		};
+	});
+
+	p.then(clean, clean);
+
+	return p.then(() => stream.getBufferedValue());
+}
+
+module.exports = getStream;
+module.exports.buffer = (stream, opts) => getStream(stream, Object.assign({}, opts, {encoding: 'buffer'}));
+module.exports.array = (stream, opts) => getStream(stream, Object.assign({}, opts, {array: true}));

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "get-stream",
+  "version": "3.0.0",
+  "description": "Get a stream as a string, buffer, or array",
+  "license": "MIT",
+  "repository": "sindresorhus/get-stream",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=4"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js",
+    "buffer-stream.js"
+  ],
+  "keywords": [
+    "get",
+    "stream",
+    "promise",
+    "concat",
+    "string",
+    "str",
+    "text",
+    "buffer",
+    "read",
+    "data",
+    "consume",
+    "readable",
+    "readablestream",
+    "array",
+    "object",
+    "obj"
+  ],
+  "devDependencies": {
+    "ava": "*",
+    "into-stream": "^3.0.0",
+    "xo": "*"
+  },
+  "xo": {
+    "esnext": true
+  }
+}

+# get-stream [![Build Status](https://travis-ci.org/sindresorhus/get-stream.svg?branch=master)](https://travis-ci.org/sindresorhus/get-stream)
+
+> Get a stream as a string, buffer, or array
+
+
+## Install
+
+```
+$ npm install --save get-stream
+```
+
+
+## Usage
+
+```js
+const fs = require('fs');
+const getStream = require('get-stream');
+const stream = fs.createReadStream('unicorn.txt');
+
+getStream(stream).then(str => {
+	console.log(str);
+	/*
+	              ,,))))))));,
+	           __)))))))))))))),
+	\|/       -\(((((''''((((((((.
+	-*-==//////((''  .     `)))))),
+	/|\      ))| o    ;-.    '(((((                                  ,(,
+	         ( `|    /  )    ;))))'                               ,_))^;(~
+	            |   |   |   ,))((((_     _____------~~~-.        %,;(;(>';'~
+	            o_);   ;    )))(((` ~---~  `::           \      %%~~)(v;(`('~
+	                  ;    ''''````         `:       `:::|\,__,%%    );`'; ~
+	                 |   _                )     /      `:|`----'     `-'
+	           ______/\/~    |                 /        /
+	         /~;;.____/;;'  /          ___--,-(   `;;;/
+	        / //  _;______;'------~~~~~    /;;/\    /
+	       //  | |                        / ;   \;;,\
+	      (<_  | ;                      /',/-----'  _>
+	       \_| ||_                     //~;~~~~~~~~~
+	           `\_|                   (,~~
+	                                   \~\
+	                                    ~~
+	*/
+});
+```
+
+
+## API
+
+The methods returns a promise that resolves when the `end` event fires on the stream, indicating that there is no more data to be read. The stream is switched to flowing mode.
+
+### getStream(stream, [options])
+
+Get the `stream` as a string.
+
+#### options
+
+##### encoding
+
+Type: `string`<br>
+Default: `utf8`
+
+[Encoding](https://nodejs.org/api/buffer.html#buffer_buffer) of the incoming stream.
+
+##### maxBuffer
+
+Type: `number`<br>
+Default: `Infinity`
+
+Maximum length of the returned string. If it exceeds this value before the stream ends, the promise will be rejected.
+
+### getStream.buffer(stream, [options])
+
+Get the `stream` as a buffer.
+
+It honors the `maxBuffer` option as above, but it refers to byte length rather than string length.
+
+### getStream.array(stream, [options])
+
+Get the `stream` as an array of values.
+
+It honors both the `maxBuffer` and `encoding` options. The behavior changes slightly based on the encoding chosen:
+
+- When `encoding` is unset, it assumes an [object mode stream](https://nodesource.com/blog/understanding-object-streams/) and collects values emitted from `stream` unmodified. In this case `maxBuffer` refers to the number of items in the array (not the sum of their sizes).
+
+- When `encoding` is set to `buffer`, it collects an array of buffers. `maxBuffer` refers to the summed byte lengths of every buffer in the array.
+
+- When `encoding` is set to anything else, it collects an array of strings. `maxBuffer` refers to the summed character lengths of every string in the array.
+
+
+## Errors
+
+If the input stream emits an `error` event, the promise will be rejected with the error. The buffered data will be attached to the `bufferedData` property of the error.
+
+```js
+getStream(streamThatErrorsAtTheEnd('unicorn'))
+	.catch(err => {
+		console.log(err.bufferedData);
+		//=> 'unicorn'
+	});
+```
+
+
+## FAQ
+
+### How is this different from [`concat-stream`](https://github.com/maxogden/concat-stream)?
+
+This module accepts a stream instead of being one and returns a promise instead of using a callback. The API is simpler and it only supports returning a string, buffer, or array. It doesn't have a fragile type inference. You explicitly choose what you want. And it doesn't depend on the huge `readable-stream` package.
+
+
+## Related
+
+- [get-stdin](https://github.com/sindresorhus/get-stdin) - Get stdin as a string or buffer
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)

+'use strict';
+const EventEmitter = require('events');
+const http = require('http');
+const https = require('https');
+const PassThrough = require('stream').PassThrough;
+const urlLib = require('url');
+const querystring = require('querystring');
+const duplexer3 = require('duplexer3');
+const isStream = require('is-stream');
+const getStream = require('get-stream');
+const timedOut = require('timed-out');
+const urlParseLax = require('url-parse-lax');
+const lowercaseKeys = require('lowercase-keys');
+const isRedirect = require('is-redirect');
+const unzipResponse = require('unzip-response');
+const createErrorClass = require('create-error-class');
+const isRetryAllowed = require('is-retry-allowed');
+const Buffer = require('safe-buffer').Buffer;
+const pkg = require('./package');
+
+function requestAsEventEmitter(opts) {
+	opts = opts || {};
+
+	const ee = new EventEmitter();
+	const requestUrl = opts.href || urlLib.resolve(urlLib.format(opts), opts.path);
+	let redirectCount = 0;
+	let retryCount = 0;
+	let redirectUrl;
+
+	const get = opts => {
+		const fn = opts.protocol === 'https:' ? https : http;
+
+		const req = fn.request(opts, res => {
+			const statusCode = res.statusCode;
+
+			if (isRedirect(statusCode) && opts.followRedirect && 'location' in res.headers && (opts.method === 'GET' || opts.method === 'HEAD')) {
+				res.resume();
+
+				if (++redirectCount > 10) {
+					ee.emit('error', new got.MaxRedirectsError(statusCode, opts), null, res);
+					return;
+				}
+
+				const bufferString = Buffer.from(res.headers.location, 'binary').toString();
+
+				redirectUrl = urlLib.resolve(urlLib.format(opts), bufferString);
+				const redirectOpts = Object.assign({}, opts, urlLib.parse(redirectUrl));
+
+				ee.emit('redirect', res, redirectOpts);
+
+				get(redirectOpts);
+
+				return;
+			}
+
+			setImmediate(() => {
+				const response = typeof unzipResponse === 'function' && req.method !== 'HEAD' ? unzipResponse(res) : res;
+				response.url = redirectUrl || requestUrl;
+				response.requestUrl = requestUrl;
+
+				ee.emit('response', response);
+			});
+		});
+
+		req.once('error', err => {
+			const backoff = opts.retries(++retryCount, err);
+
+			if (backoff) {
+				setTimeout(get, backoff, opts);
+				return;
+			}
+
+			ee.emit('error', new got.RequestError(err, opts));
+		});
+
+		if (opts.gotTimeout) {
+			timedOut(req, opts.gotTimeout);
+		}
+
+		setImmediate(() => {
+			ee.emit('request', req);
+		});
+	};
+
+	get(opts);
+	return ee;
+}
+
+function asPromise(opts) {
+	return new Promise((resolve, reject) => {
+		const ee = requestAsEventEmitter(opts);
+
+		ee.on('request', req => {
+			if (isStream(opts.body)) {
+				opts.body.pipe(req);
+				opts.body = undefined;
+				return;
+			}
+
+			req.end(opts.body);
+		});
+
+		ee.on('response', res => {
+			const stream = opts.encoding === null ? getStream.buffer(res) : getStream(res, opts);
+
+			stream
+				.catch(err => reject(new got.ReadError(err, opts)))
+				.then(data => {
+					const statusCode = res.statusCode;
+					const limitStatusCode = opts.followRedirect ? 299 : 399;
+
+					res.body = data;
+
+					if (opts.json && res.body) {
+						try {
+							res.body = JSON.parse(res.body);
+						} catch (e) {
+							throw new got.ParseError(e, statusCode, opts, data);
+						}
+					}
+
+					if (statusCode < 200 || statusCode > limitStatusCode) {
+						throw new got.HTTPError(statusCode, opts);
+					}
+
+					resolve(res);
+				})
+				.catch(err => {
+					Object.defineProperty(err, 'response', {value: res});
+					reject(err);
+				});
+		});
+
+		ee.on('error', reject);
+	});
+}
+
+function asStream(opts) {
+	const input = new PassThrough();
+	const output = new PassThrough();
+	const proxy = duplexer3(input, output);
+
+	if (opts.json) {
+		throw new Error('got can not be used as stream when options.json is used');
+	}
+
+	if (opts.body) {
+		proxy.write = () => {
+			throw new Error('got\'s stream is not writable when options.body is used');
+		};
+	}
+
+	const ee = requestAsEventEmitter(opts);
+
+	ee.on('request', req => {
+		proxy.emit('request', req);
+
+		if (isStream(opts.body)) {
+			opts.body.pipe(req);
+			return;
+		}
+
+		if (opts.body) {
+			req.end(opts.body);
+			return;
+		}
+
+		if (opts.method === 'POST' || opts.method === 'PUT' || opts.method === 'PATCH') {
+			input.pipe(req);
+			return;
+		}
+
+		req.end();
+	});
+
+	ee.on('response', res => {
+		const statusCode = res.statusCode;
+
+		res.pipe(output);
+
+		if (statusCode < 200 || statusCode > 299) {
+			proxy.emit('error', new got.HTTPError(statusCode, opts), null, res);
+			return;
+		}
+
+		proxy.emit('response', res);
+	});
+
+	ee.on('redirect', proxy.emit.bind(proxy, 'redirect'));
+	ee.on('error', proxy.emit.bind(proxy, 'error'));
+
+	return proxy;
+}
+
+function normalizeArguments(url, opts) {
+	if (typeof url !== 'string' && typeof url !== 'object') {
+		throw new Error(`Parameter \`url\` must be a string or object, not ${typeof url}`);
+	}
+
+	if (typeof url === 'string') {
+		url = url.replace(/^unix:/, 'http://$&');
+		url = urlParseLax(url);
+
+		if (url.auth) {
+			throw new Error('Basic authentication must be done with auth option');
+		}
+	}
+
+	opts = Object.assign(
+		{
+			protocol: 'http:',
+			path: '',
+			retries: 5
+		},
+		url,
+		opts
+	);
+
+	opts.headers = Object.assign({
+		'user-agent': `${pkg.name}/${pkg.version} (https://github.com/sindresorhus/got)`,
+		'accept-encoding': 'gzip,deflate'
+	}, lowercaseKeys(opts.headers));
+
+	const query = opts.query;
+
+	if (query) {
+		if (typeof query !== 'string') {
+			opts.query = querystring.stringify(query);
+		}
+
+		opts.path = `${opts.path.split('?')[0]}?${opts.query}`;
+		delete opts.query;
+	}
+
+	if (opts.json && opts.headers.accept === undefined) {
+		opts.headers.accept = 'application/json';
+	}
+
+	let body = opts.body;
+
+	if (body) {
+		if (typeof body !== 'string' && !(body !== null && typeof body === 'object')) {
+			throw new Error('options.body must be a ReadableStream, string, Buffer or plain Object');
+		}
+
+		opts.method = opts.method || 'POST';
+
+		if (isStream(body) && typeof body.getBoundary === 'function') {
+			// Special case for https://github.com/form-data/form-data
+			opts.headers['content-type'] = opts.headers['content-type'] || `multipart/form-data; boundary=${body.getBoundary()}`;
+		} else if (body !== null && typeof body === 'object' && !Buffer.isBuffer(body) && !isStream(body)) {
+			opts.headers['content-type'] = opts.headers['content-type'] || 'application/x-www-form-urlencoded';
+			body = opts.body = querystring.stringify(body);
+		}
+
+		if (opts.headers['content-length'] === undefined && opts.headers['transfer-encoding'] === undefined && !isStream(body)) {
+			const length = typeof body === 'string' ? Buffer.byteLength(body) : body.length;
+			opts.headers['content-length'] = length;
+		}
+	}
+
+	opts.method = (opts.method || 'GET').toUpperCase();
+
+	if (opts.hostname === 'unix') {
+		const matches = /(.+):(.+)/.exec(opts.path);
+
+		if (matches) {
+			opts.socketPath = matches[1];
+			opts.path = matches[2];
+			opts.host = null;
+		}
+	}
+
+	if (typeof opts.retries !== 'function') {
+		const retries = opts.retries;
+
+		opts.retries = (iter, err) => {
+			if (iter > retries || !isRetryAllowed(err)) {
+				return 0;
+			}
+
+			const noise = Math.random() * 100;
+
+			return ((1 << iter) * 1000) + noise;
+		};
+	}
+
+	if (opts.followRedirect === undefined) {
+		opts.followRedirect = true;
+	}
+
+	if (opts.timeout) {
+		opts.gotTimeout = opts.timeout;
+		delete opts.timeout;
+	}
+
+	return opts;
+}
+
+function got(url, opts) {
+	try {
+		return asPromise(normalizeArguments(url, opts));
+	} catch (err) {
+		return Promise.reject(err);
+	}
+}
+
+const helpers = [
+	'get',
+	'post',
+	'put',
+	'patch',
+	'head',
+	'delete'
+];
+
+helpers.forEach(el => {
+	got[el] = (url, opts) => got(url, Object.assign({}, opts, {method: el}));
+});
+
+got.stream = (url, opts) => asStream(normalizeArguments(url, opts));
+
+for (const el of helpers) {
+	got.stream[el] = (url, opts) => got.stream(url, Object.assign({}, opts, {method: el}));
+}
+
+function stdError(error, opts) {
+	if (error.code !== undefined) {
+		this.code = error.code;
+	}
+
+	Object.assign(this, {
+		message: error.message,
+		host: opts.host,
+		hostname: opts.hostname,
+		method: opts.method,
+		path: opts.path
+	});
+}
+
+got.RequestError = createErrorClass('RequestError', stdError);
+got.ReadError = createErrorClass('ReadError', stdError);
+got.ParseError = createErrorClass('ParseError', function (e, statusCode, opts, data) {
+	stdError.call(this, e, opts);
+	this.statusCode = statusCode;
+	this.statusMessage = http.STATUS_CODES[this.statusCode];
+	this.message = `${e.message} in "${urlLib.format(opts)}": \n${data.slice(0, 77)}...`;
+});
+
+got.HTTPError = createErrorClass('HTTPError', function (statusCode, opts) {
+	stdError.call(this, {}, opts);
+	this.statusCode = statusCode;
+	this.statusMessage = http.STATUS_CODES[this.statusCode];
+	this.message = `Response code ${this.statusCode} (${this.statusMessage})`;
+});
+
+got.MaxRedirectsError = createErrorClass('MaxRedirectsError', function (statusCode, opts) {
+	stdError.call(this, {}, opts);
+	this.statusCode = statusCode;
+	this.statusMessage = http.STATUS_CODES[this.statusCode];
+	this.message = 'Redirected 10 times. Aborting.';
+});
+
+module.exports = got;

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "got",
+  "version": "6.7.1",
+  "description": "Simplified HTTP requests",
+  "license": "MIT",
+  "repository": "sindresorhus/got",
+  "maintainers": [
+    {
+      "name": "Sindre Sorhus",
+      "email": "sindresorhus@gmail.com",
+      "url": "sindresorhus.com"
+    },
+    {
+      "name": "Vsevolod Strukchinsky",
+      "email": "floatdrop@gmail.com",
+      "url": "github.com/floatdrop"
+    }
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "browser": {
+    "unzip-response": false
+  },
+  "scripts": {
+    "test": "xo && nyc ava",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "http",
+    "https",
+    "get",
+    "got",
+    "url",
+    "uri",
+    "request",
+    "util",
+    "utility",
+    "simple",
+    "curl",
+    "wget",
+    "fetch"
+  ],
+  "dependencies": {
+    "create-error-class": "^3.0.0",
+    "duplexer3": "^0.1.4",
+    "get-stream": "^3.0.0",
+    "is-redirect": "^1.0.0",
+    "is-retry-allowed": "^1.0.0",
+    "is-stream": "^1.0.0",
+    "lowercase-keys": "^1.0.0",
+    "safe-buffer": "^5.0.1",
+    "timed-out": "^4.0.0",
+    "unzip-response": "^2.0.1",
+    "url-parse-lax": "^1.0.0"
+  },
+  "devDependencies": {
+    "ava": "^0.17.0",
+    "coveralls": "^2.11.4",
+    "form-data": "^2.1.1",
+    "get-port": "^2.0.0",
+    "into-stream": "^3.0.0",
+    "nyc": "^10.0.0",
+    "pem": "^1.4.4",
+    "pify": "^2.3.0",
+    "tempfile": "^1.1.1",
+    "xo": "*"
+  },
+  "xo": {
+    "esnext": true
+  },
+  "ava": {
+    "concurrency": 4
+  }
+}

+<h1 align="center">
+	<br>
+	<img width="360" src="https://rawgit.com/sindresorhus/got/master/media/logo.svg" alt="got">
+	<br>
+	<br>
+	<br>
+</h1>
+
+> Simplified HTTP requests
+
+[![Build Status](https://travis-ci.org/sindresorhus/got.svg?branch=master)](https://travis-ci.org/sindresorhus/got) [![Coverage Status](https://coveralls.io/repos/github/sindresorhus/got/badge.svg?branch=master)](https://coveralls.io/github/sindresorhus/got?branch=master) [![Downloads](https://img.shields.io/npm/dm/got.svg)](https://npmjs.com/got)
+
+A nicer interface to the built-in [`http`](http://nodejs.org/api/http.html) module.
+
+It supports following redirects, promises, streams, retries, automagically handling gzip/deflate and some convenience options.
+
+Created because [`request`](https://github.com/request/request) is bloated *(several megabytes!)*.
+
+
+## Install
+
+**WARNING: Node.js 4 or higher is required for got@6 and above.** For older Node.js versions use [got@5](https://github.com/sindresorhus/got/tree/v5.x).
+
+```
+$ npm install --save got
+```
+
+
+## Usage
+
+```js
+const fs = require('fs');
+const got = require('got');
+
+got('todomvc.com')
+	.then(response => {
+		console.log(response.body);
+		//=> '<!doctype html> ...'
+	})
+	.catch(error => {
+		console.log(error.response.body);
+		//=> 'Internal server error ...'
+	});
+
+// Streams
+got.stream('todomvc.com').pipe(fs.createWriteStream('index.html'));
+
+// For POST, PUT and PATCH methods got.stream returns a WritableStream
+fs.createReadStream('index.html').pipe(got.stream.post('todomvc.com'));
+```
+
+
+### API
+
+It's a `GET` request by default, but can be changed in `options`.
+
+#### got(url, [options])
+
+Returns a Promise for a `response` object with a `body` property, a `url` property with the request URL or the final URL after redirects, and a `requestUrl` property with the original request URL.
+
+##### url
+
+Type: `string`, `object`
+
+The URL to request or a [`http.request` options](https://nodejs.org/api/http.html#http_http_request_options_callback) object.
+
+Properties from `options` will override properties in the parsed `url`.
+
+##### options
+
+Type: `object`
+
+Any of the [`http.request`](http://nodejs.org/api/http.html#http_http_request_options_callback) options.
+
+###### body
+
+Type: `string`, `buffer`, `readableStream`, `object`
+
+*This is mutually exclusive with stream mode.*
+
+Body that will be sent with a `POST` request.
+
+If present in `options` and `options.method` is not set, `options.method` will be set to `POST`.
+
+If `content-length` or `transfer-encoding` is not set in `options.headers` and `body` is a string or buffer, `content-length` will be set to the body length.
+
+If `body` is a plain object, it will be stringified with [`querystring.stringify`](https://nodejs.org/api/querystring.html#querystring_querystring_stringify_obj_sep_eq_options) and sent as `application/x-www-form-urlencoded`.
+
+###### encoding
+
+Type: `string`, `null`<br>
+Default: `'utf8'`
+
+Encoding to be used on `setEncoding` of the response data. If `null`, the body is returned as a Buffer.
+
+###### json
+
+Type: `boolean`<br>
+Default: `false`
+
+*This is mutually exclusive with stream mode.*
+
+Parse response body with `JSON.parse` and set `accept` header to `application/json`.
+
+###### query
+
+Type: `string`, `object`<br>
+
+Query string object that will be added to the request URL. This will override the query string in `url`.
+
+###### timeout
+
+Type: `number`, `object`
+
+Milliseconds to wait for a server to send response headers before aborting request with `ETIMEDOUT` error.
+
+Option accepts `object` with separate `connect` and `socket` fields for connection and socket inactivity timeouts.
+
+###### retries
+
+Type: `number`, `function`<br>
+Default: `5`
+
+Number of request retries when network errors happens. Delays between retries counts with function `1000 * Math.pow(2, retry) + Math.random() * 100`, where `retry` is attempt number (starts from 0).
+
+Option accepts `function` with `retry` and `error` arguments. Function must return delay in milliseconds (`0` return value cancels retry).
+
+**Note:** if `retries` is `number`, `ENOTFOUND` and `ENETUNREACH` error will not be retried (see full list in [`is-retry-allowed`](https://github.com/floatdrop/is-retry-allowed/blob/master/index.js#L12) module).
+
+###### followRedirect
+
+Type: `boolean`<br>
+Default: `true`
+
+Defines if redirect responses should be followed automatically.
+
+
+#### Streams
+
+#### got.stream(url, [options])
+
+`stream` method will return Duplex stream with additional events:
+
+##### .on('request', request)
+
+`request` event to get the request object of the request.
+
+**Tip**: You can use `request` event to abort request:
+
+```js
+got.stream('github.com')
+	.on('request', req => setTimeout(() => req.abort(), 50));
+```
+
+##### .on('response', response)
+
+`response` event to get the response object of the final request.
+
+##### .on('redirect', response, nextOptions)
+
+`redirect` event to get the response object of a redirect. The second argument is options for the next request to the redirect location.
+
+##### .on('error', error, body, response)
+
+`error` event emitted in case of protocol error (like `ENOTFOUND` etc.) or status error (4xx or 5xx). The second argument is the body of the server response in case of status error. The third argument is response object.
+
+#### got.get(url, [options])
+#### got.post(url, [options])
+#### got.put(url, [options])
+#### got.patch(url, [options])
+#### got.head(url, [options])
+#### got.delete(url, [options])
+
+Sets `options.method` to the method name and makes a request.
+
+
+## Errors
+
+Each error contains (if available) `statusCode`, `statusMessage`, `host`, `hostname`, `method` and `path` properties to make debugging easier.
+
+In Promise mode, the `response` is attached to the error.
+
+#### got.RequestError
+
+When a request fails. Contains a `code` property with error class code, like `ECONNREFUSED`.
+
+#### got.ReadError
+
+When reading from response stream fails.
+
+#### got.ParseError
+
+When `json` option is enabled and `JSON.parse` fails.
+
+#### got.HTTPError
+
+When server response code is not 2xx. Contains `statusCode` and `statusMessage`.
+
+#### got.MaxRedirectsError
+
+When server redirects you more than 10 times.
+
+
+## Proxies
+
+You can use the [`tunnel`](https://github.com/koichik/node-tunnel) module with the `agent` option to work with proxies:
+
+```js
+const got = require('got');
+const tunnel = require('tunnel');
+
+got('todomvc.com', {
+	agent: tunnel.httpOverHttp({
+		proxy: {
+			host: 'localhost'
+		}
+	})
+});
+```
+
+
+## Cookies
+
+You can use the [`cookie`](https://github.com/jshttp/cookie) module to include cookies in a request:
+
+```js
+const got = require('got');
+const cookie = require('cookie');
+
+got('google.com', {
+	headers: {
+		cookie: cookie.serialize('foo', 'bar')
+	}
+});
+```
+
+
+## Form data
+
+You can use the [`form-data`](https://github.com/form-data/form-data) module to create POST request with form data:
+
+```js
+const fs = require('fs');
+const got = require('got');
+const FormData = require('form-data');
+const form = new FormData();
+
+form.append('my_file', fs.createReadStream('/foo/bar.jpg'));
+
+got.post('google.com', {
+	body: form
+});
+```
+
+
+## OAuth
+
+You can use the [`oauth-1.0a`](https://github.com/ddo/oauth-1.0a) module to create a signed OAuth request:
+
+```js
+const got = require('got');
+const crypto  = require('crypto');
+const OAuth = require('oauth-1.0a');
+
+const oauth = OAuth({
+	consumer: {
+		key: process.env.CONSUMER_KEY,
+		secret: process.env.CONSUMER_SECRET
+	},
+	signature_method: 'HMAC-SHA1',
+	hash_function: (baseString, key) => crypto.createHmac('sha1', key).update(baseString).digest('base64')
+});
+
+const token = {
+	key: process.env.ACCESS_TOKEN,
+	secret: process.env.ACCESS_TOKEN_SECRET
+};
+
+const url = 'https://api.twitter.com/1.1/statuses/home_timeline.json';
+
+got(url, {
+	headers: oauth.toHeader(oauth.authorize({url, method: 'GET'}, token)),
+	json: true
+});
+```
+
+
+## Unix Domain Sockets
+
+Requests can also be sent via [unix domain sockets](http://serverfault.com/questions/124517/whats-the-difference-between-unix-socket-and-tcp-ip-socket). Use the following URL scheme: `PROTOCOL://unix:SOCKET:PATH`.
+
+- `PROTOCOL` - `http` or `https` *(optional)*
+- `SOCKET` - absolute path to a unix domain socket, e.g. `/var/run/docker.sock`
+- `PATH` - request path, e.g. `/v2/keys`
+
+```js
+got('http://unix:/var/run/docker.sock:/containers/json');
+
+// or without protocol (http by default)
+got('unix:/var/run/docker.sock:/containers/json');
+```
+
+
+## Tip
+
+It's a good idea to set the `'user-agent'` header so the provider can more easily see how their resource is used. By default, it's the URL to this repo.
+
+```js
+const got = require('got');
+const pkg = require('./package.json');
+
+got('todomvc.com', {
+	headers: {
+		'user-agent': `my-module/${pkg.version} (https://github.com/username/my-module)`
+	}
+});
+```
+
+
+## Related
+
+- [gh-got](https://github.com/sindresorhus/gh-got) - Convenience wrapper for interacting with the GitHub API
+- [travis-got](https://github.com/samverschueren/travis-got) - Convenience wrapper for interacting with the Travis API
+
+
+## Created by
+
+[![Sindre Sorhus](https://avatars.githubusercontent.com/u/170270?v=3&s=100)](https://sindresorhus.com) | [![Vsevolod Strukchinsky](https://avatars.githubusercontent.com/u/365089?v=3&s=100)](https://github.com/floatdrop)
+---|---
+[Sindre Sorhus](https://sindresorhus.com) | [Vsevolod Strukchinsky](https://github.com/floatdrop)
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)

+'use strict';
+module.exports = function (x) {
+	if (typeof x !== 'number') {
+		throw new TypeError('Expected a number');
+	}
+
+	return x === 300 ||
+		x === 301 ||
+		x === 302 ||
+		x === 303 ||
+		x === 305 ||
+		x === 307 ||
+		x === 308;
+};

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "is-redirect",
+  "version": "1.0.0",
+  "description": "Check if a number is a redirect HTTP status code",
+  "license": "MIT",
+  "repository": "sindresorhus/is-redirect",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "node test.js"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "redirect",
+    "http",
+    "https",
+    "status",
+    "code",
+    "codes",
+    "is",
+    "check",
+    "detect"
+  ],
+  "devDependencies": {
+    "ava": "0.0.4"
+  }
+}

+# is-redirect [![Build Status](https://travis-ci.org/sindresorhus/is-redirect.svg?branch=master)](https://travis-ci.org/sindresorhus/is-redirect)
+
+> Check if a number is a [redirect HTTP status code](http://en.wikipedia.org/wiki/List_of_HTTP_status_codes#3xx_Redirection)
+
+
+## Install
+
+```
+$ npm install --save is-redirect
+```
+
+
+## Usage
+
+```js
+var isRedirect = require('is-redirect');
+
+isRedirect(302);
+//=> true
+
+isRedirect(200);
+//=> false
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)

+'use strict';
+
+var WHITELIST = [
+	'ETIMEDOUT',
+	'ECONNRESET',
+	'EADDRINUSE',
+	'ESOCKETTIMEDOUT',
+	'ECONNREFUSED',
+	'EPIPE',
+	'EHOSTUNREACH',
+	'EAI_AGAIN'
+];
+
+var BLACKLIST = [
+	'ENOTFOUND',
+	'ENETUNREACH',
+
+	// SSL errors from https://github.com/nodejs/node/blob/ed3d8b13ee9a705d89f9e0397d9e96519e7e47ac/src/node_crypto.cc#L1950
+	'UNABLE_TO_GET_ISSUER_CERT',
+	'UNABLE_TO_GET_CRL',
+	'UNABLE_TO_DECRYPT_CERT_SIGNATURE',
+	'UNABLE_TO_DECRYPT_CRL_SIGNATURE',
+	'UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY',
+	'CERT_SIGNATURE_FAILURE',
+	'CRL_SIGNATURE_FAILURE',
+	'CERT_NOT_YET_VALID',
+	'CERT_HAS_EXPIRED',
+	'CRL_NOT_YET_VALID',
+	'CRL_HAS_EXPIRED',
+	'ERROR_IN_CERT_NOT_BEFORE_FIELD',
+	'ERROR_IN_CERT_NOT_AFTER_FIELD',
+	'ERROR_IN_CRL_LAST_UPDATE_FIELD',
+	'ERROR_IN_CRL_NEXT_UPDATE_FIELD',
+	'OUT_OF_MEM',
+	'DEPTH_ZERO_SELF_SIGNED_CERT',
+	'SELF_SIGNED_CERT_IN_CHAIN',
+	'UNABLE_TO_GET_ISSUER_CERT_LOCALLY',
+	'UNABLE_TO_VERIFY_LEAF_SIGNATURE',
+	'CERT_CHAIN_TOO_LONG',
+	'CERT_REVOKED',
+	'INVALID_CA',
+	'PATH_LENGTH_EXCEEDED',
+	'INVALID_PURPOSE',
+	'CERT_UNTRUSTED',
+	'CERT_REJECTED'
+];
+
+module.exports = function (err) {
+	if (!err || !err.code) {
+		return true;
+	}
+
+	if (WHITELIST.indexOf(err.code) !== -1) {
+		return true;
+	}
+
+	if (BLACKLIST.indexOf(err.code) !== -1) {
+		return false;
+	}
+
+	return true;
+};

+The MIT License (MIT)
+
+Copyright (c) Vsevolod Strukchinsky <floatdrop@gmail.com> (github.com/floatdrop)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "is-retry-allowed",
+  "version": "1.2.0",
+  "description": "Is retry allowed for Error?",
+  "license": "MIT",
+  "repository": "floatdrop/is-retry-allowed",
+  "author": {
+    "name": "Vsevolod Strukchinsky",
+    "email": "floatdrop@gmail.com",
+    "url": "github.com/floatdrop"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    ""
+  ],
+  "dependencies": {},
+  "devDependencies": {
+    "ava": "^0.8.0",
+    "xo": "^0.12.1"
+  }
+}

+# is-retry-allowed [![Build Status](https://travis-ci.org/floatdrop/is-retry-allowed.svg?branch=master)](https://travis-ci.org/floatdrop/is-retry-allowed)
+
+Is retry allowed for Error?
+
+
+## Install
+
+```
+$ npm install --save is-retry-allowed
+```
+
+
+## Usage
+
+```js
+const isRetryAllowed = require('is-retry-allowed');
+
+isRetryAllowed({code: 'ETIMEDOUT'});
+//=> true
+
+isRetryAllowed({code: 'ENOTFOUND'});
+//=> false
+
+isRetryAllowed({});
+//=> true
+```
+
+
+## API
+
+### isRetryAllowed(error)
+
+#### error
+
+Type: `object`
+
+Object with `code` property, which will be used to determine retry.
+
+
+## License
+
+MIT © [Vsevolod Strukchinsky](http://github.com/floatdrop)

+'use strict';
+
+var isStream = module.exports = function (stream) {
+	return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function';
+};
+
+isStream.writable = function (stream) {
+	return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object';
+};
+
+isStream.readable = function (stream) {
+	return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object';
+};
+
+isStream.duplex = function (stream) {
+	return isStream.writable(stream) && isStream.readable(stream);
+};
+
+isStream.transform = function (stream) {
+	return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object';
+};

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "is-stream",
+  "version": "1.1.0",
+  "description": "Check if something is a Node.js stream",
+  "license": "MIT",
+  "repository": "sindresorhus/is-stream",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "stream",
+    "type",
+    "streams",
+    "writable",
+    "readable",
+    "duplex",
+    "transform",
+    "check",
+    "detect",
+    "is"
+  ],
+  "devDependencies": {
+    "ava": "*",
+    "tempfile": "^1.1.0",
+    "xo": "*"
+  }
+}

+# is-stream [![Build Status](https://travis-ci.org/sindresorhus/is-stream.svg?branch=master)](https://travis-ci.org/sindresorhus/is-stream)
+
+> Check if something is a [Node.js stream](https://nodejs.org/api/stream.html)
+
+
+## Install
+
+```
+$ npm install --save is-stream
+```
+
+
+## Usage
+
+```js
+const fs = require('fs');
+const isStream = require('is-stream');
+
+isStream(fs.createReadStream('unicorn.png'));
+//=> true
+
+isStream({});
+//=> false
+```
+
+
+## API
+
+### isStream(stream)
+
+#### isStream.writable(stream)
+
+#### isStream.readable(stream)
+
+#### isStream.duplex(stream)
+
+#### isStream.transform(stream)
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)

+'use strict';
+module.exports = function (obj) {
+	var ret = {};
+	var keys = Object.keys(Object(obj));
+
+	for (var i = 0; i < keys.length; i++) {
+		ret[keys[i].toLowerCase()] = obj[keys[i]];
+	}
+
+	return ret;
+};

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "lowercase-keys",
+  "version": "1.0.1",
+  "description": "Lowercase the keys of an object",
+  "license": "MIT",
+  "repository": "sindresorhus/lowercase-keys",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "object",
+    "assign",
+    "extend",
+    "properties",
+    "lowercase",
+    "lower-case",
+    "case",
+    "keys",
+    "key"
+  ],
+  "devDependencies": {
+    "ava": "*"
+  }
+}

+# lowercase-keys [![Build Status](https://travis-ci.org/sindresorhus/lowercase-keys.svg?branch=master)](https://travis-ci.org/sindresorhus/lowercase-keys)
+
+> Lowercase the keys of an object
+
+
+## Install
+
+```
+$ npm install --save lowercase-keys
+```
+
+
+## Usage
+
+```js
+var lowercaseKeys = require('lowercase-keys');
+
+lowercaseKeys({FOO: true, bAr: false});
+//=> {foo: true, bar: false}
+```
+
+
+## API
+
+### lowercaseKeys(object)
+
+Lowercases the keys and returns a new object.
+
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)

+'use strict';
+module.exports = function (url) {
+	if (typeof url !== 'string') {
+		throw new TypeError('Expected a string, got ' + typeof url);
+	}
+
+	url = url.trim();
+
+	if (/^\.*\/|^(?!localhost)\w+:/.test(url)) {
+		return url;
+	}
+
+	return url.replace(/^(?!(?:\w+:)?\/\/)/, 'http://');
+};

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "prepend-http",
+  "version": "1.0.4",
+  "description": "Prepend `http://` to humanized URLs like todomvc.com and localhost",
+  "license": "MIT",
+  "repository": "sindresorhus/prepend-http",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "prepend",
+    "protocol",
+    "scheme",
+    "url",
+    "uri",
+    "http",
+    "https",
+    "humanized"
+  ],
+  "devDependencies": {
+    "ava": "*",
+    "xo": "*"
+  }
+}

+# prepend-http [![Build Status](https://travis-ci.org/sindresorhus/prepend-http.svg?branch=master)](https://travis-ci.org/sindresorhus/prepend-http)
+
+> Prepend `http://` to humanized URLs like `todomvc.com` and `localhost`
+
+
+## Install
+
+```
+$ npm install --save prepend-http
+```
+
+
+## Usage
+
+```js
+const prependHttp = require('prepend-http');
+
+prependHttp('todomvc.com');
+//=> 'http://todomvc.com'
+
+prependHttp('localhost');
+//=> 'http://localhost'
+
+prependHttp('http://todomvc.com');
+//=> 'http://todomvc.com'
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)

+'use strict';
+
+const got = require('got');
+const uniqueRandomArray = require('unique-random-array');
+const EventEmitter = require('eventemitter3');
+
+const randomCache = {};
+
+function formatResult(getRandomImage) {
+    const imageData = getRandomImage();
+    if (!imageData) {
+        return;
+    }
+    return `http://imgur.com/${imageData.hash}${imageData.ext.replace(/\?.*/, '')}`;
+}
+
+function storeResults(images, subreddit) {
+    const getRandomImage = uniqueRandomArray(images);
+
+    randomCache[subreddit] = getRandomImage;
+    return getRandomImage;
+}
+
+function randomPuppy(subreddit) {
+    subreddit = (typeof subreddit === 'string' && subreddit.length !== 0) ? subreddit : 'puppies';
+
+    if (randomCache[subreddit]) {
+        return Promise.resolve(formatResult(randomCache[subreddit]));
+    }
+
+    return got(`https://imgur.com/r/${subreddit}/hot.json`, {json: true})
+        .then(response => storeResults(response.body.data, subreddit))
+        .then(getRandomImage => formatResult(getRandomImage));
+}
+
+// silly feature to play with observables
+function all(subreddit) {
+    const eventEmitter = new EventEmitter();
+
+    function emitRandomImage(subreddit) {
+        randomPuppy(subreddit).then(imageUrl => {
+            eventEmitter.emit('data', imageUrl + '#' + subreddit);
+            if (eventEmitter.listeners('data').length) {
+                setTimeout(() => emitRandomImage(subreddit), 200);
+            }
+        });
+    }
+
+    emitRandomImage(subreddit);
+    return eventEmitter;
+}
+
+function callback(subreddit, cb) {
+    randomPuppy(subreddit)
+        .then(url => cb(null, url))
+        .catch(err => cb(err));
+}
+
+// subreddit is optional
+// callback support is provided for a training exercise
+module.exports = (subreddit, cb) => {
+    if (typeof cb === 'function') {
+        callback(subreddit, cb);
+    } else if (typeof subreddit === 'function') {
+        callback(null, subreddit);
+    } else {
+        return randomPuppy(subreddit);
+    }
+};
+
+module.exports.all = all;

+The MIT License (MIT)
+
+Copyright (c) Dylan Greene <dylang@gmail.com> (github.com/dylang)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "random-puppy",
+  "version": "1.1.0",
+  "description": "Get a random imgur image url, by default a puppy.",
+  "license": "MIT",
+  "repository": "dylang/random-puppy",
+  "author": {
+    "name": "Dylan Greene",
+    "email": "dylang@gmail.com",
+    "url": "github.com/dylang"
+  },
+  "engines": {
+    "node": ">=4.0.0"
+  },
+  "scripts": {
+    "test": "xo && ava",
+    "watch": "ava --watch"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "puppy",
+    "doggie",
+    "dog",
+    "imgur",
+    "random",
+    "placeholder"
+  ],
+  "dependencies": {
+    "eventemitter3": "^1.2.0",
+    "got": "^6.3.0",
+    "unique-random-array": "^1.0.0"
+  },
+  "devDependencies": {
+    "ava": "^0.14.0",
+    "rx-lite": "^4.0.8",
+    "xo": "^0.14.0"
+  },
+  "xo": {
+    "space": 4
+  }
+}

+# random-puppy [![Build Status](https://travis-ci.org/dylang/random-puppy.svg?branch=master)](https://travis-ci.org/dylang/random-puppy)
+
+> Get a random puppy image url.
+
+<img src="http://i.imgur.com/0zZ8m6B.jpg" width="300px">
+
+## Install
+
+```
+$ npm install --save random-puppy
+```
+
+
+## Usage
+
+```js
+const randomPuppy = require('random-puppy');
+
+randomPuppy()
+    .then(url => {
+        console.log(url);
+    })
+
+//=> 'http://imgur.com/IoI8uS5'
+```
+
+
+## API
+
+### `randomPuppy()`
+
+Returns a `promise` for a random puppy image url from http://imgur.com/ from https://www.reddit.com/r/puppy
+
+### `randomPuppy(subreddit)`
+
+Returns a `promise` for a random image url from the selected subreddit. *Warning: We cannot promise it will be a image of a puppy!*
+
+### `randomPuppy.all(subreddit)`
+
+Returns an `eventemitter` for getting all random images for a subreddit.
+
+```js
+const event = randomPuppy.all(subreddit);
+event.on('data', url => console.log(url));
+```
+
+Or:
+```js
+const event = randomPuppy.all('puppies');
+
+Observable.fromEvent(event, 'data')
+    .subscribe(data => {
+      console.log(data);
+    });
+```
+
+## Notes
+
+* Node 4 or newer.
+* Caches results from imgur in memory.
+* Created for the purpose of using in a training exercise on different ways to do async in JavaScript at [Opower](https://opower.com/).
+
+## License
+
+MIT © [Dylan Greene](https://github.com/dylang)

+The MIT License (MIT)
+
+Copyright (c) Feross Aboukhadijeh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+# safe-buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/safe-buffer/master.svg
+[travis-url]: https://travis-ci.org/feross/safe-buffer
+[npm-image]: https://img.shields.io/npm/v/safe-buffer.svg
+[npm-url]: https://npmjs.org/package/safe-buffer
+[downloads-image]: https://img.shields.io/npm/dm/safe-buffer.svg
+[downloads-url]: https://npmjs.org/package/safe-buffer
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+#### Safer Node.js Buffer API
+
+**Use the new Node.js Buffer APIs (`Buffer.from`, `Buffer.alloc`,
+`Buffer.allocUnsafe`, `Buffer.allocUnsafeSlow`) in all versions of Node.js.**
+
+**Uses the built-in implementation when available.**
+
+## install
+
+```
+npm install safe-buffer
+```
+
+## usage
+
+The goal of this package is to provide a safe replacement for the node.js `Buffer`.
+
+It's a drop-in replacement for `Buffer`. You can use it by adding one `require` line to
+the top of your node.js modules:
+
+```js
+var Buffer = require('safe-buffer').Buffer
+
+// Existing buffer code will continue to work without issues:
+
+new Buffer('hey', 'utf8')
+new Buffer([1, 2, 3], 'utf8')
+new Buffer(obj)
+new Buffer(16) // create an uninitialized buffer (potentially unsafe)
+
+// But you can use these new explicit APIs to make clear what you want:
+
+Buffer.from('hey', 'utf8') // convert from many types to a Buffer
+Buffer.alloc(16) // create a zero-filled buffer (safe)
+Buffer.allocUnsafe(16) // create an uninitialized buffer (potentially unsafe)
+```
+
+## api
+
+### Class Method: Buffer.from(array)
+<!-- YAML
+added: v3.0.0
+-->
+
+* `array` {Array}
+
+Allocates a new `Buffer` using an `array` of octets.
+
+```js
+const buf = Buffer.from([0x62,0x75,0x66,0x66,0x65,0x72]);
+  // creates a new Buffer containing ASCII bytes
+  // ['b','u','f','f','e','r']
+```
+
+A `TypeError` will be thrown if `array` is not an `Array`.
+
+### Class Method: Buffer.from(arrayBuffer[, byteOffset[, length]])
+<!-- YAML
+added: v5.10.0
+-->
+
+* `arrayBuffer` {ArrayBuffer} The `.buffer` property of a `TypedArray` or
+  a `new ArrayBuffer()`
+* `byteOffset` {Number} Default: `0`
+* `length` {Number} Default: `arrayBuffer.length - byteOffset`
+
+When passed a reference to the `.buffer` property of a `TypedArray` instance,
+the newly created `Buffer` will share the same allocated memory as the
+TypedArray.
+
+```js
+const arr = new Uint16Array(2);
+arr[0] = 5000;
+arr[1] = 4000;
+
+const buf = Buffer.from(arr.buffer); // shares the memory with arr;
+
+console.log(buf);
+  // Prints: <Buffer 88 13 a0 0f>
+
+// changing the TypedArray changes the Buffer also
+arr[1] = 6000;
+
+console.log(buf);
+  // Prints: <Buffer 88 13 70 17>
+```
+
+The optional `byteOffset` and `length` arguments specify a memory range within
+the `arrayBuffer` that will be shared by the `Buffer`.
+
+```js
+const ab = new ArrayBuffer(10);
+const buf = Buffer.from(ab, 0, 2);
+console.log(buf.length);
+  // Prints: 2
+```
+
+A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer`.
+
+### Class Method: Buffer.from(buffer)
+<!-- YAML
+added: v3.0.0
+-->
+
+* `buffer` {Buffer}
+
+Copies the passed `buffer` data onto a new `Buffer` instance.
+
+```js
+const buf1 = Buffer.from('buffer');
+const buf2 = Buffer.from(buf1);
+
+buf1[0] = 0x61;
+console.log(buf1.toString());
+  // 'auffer'
+console.log(buf2.toString());
+  // 'buffer' (copy is not changed)
+```
+
+A `TypeError` will be thrown if `buffer` is not a `Buffer`.
+
+### Class Method: Buffer.from(str[, encoding])
+<!-- YAML
+added: v5.10.0
+-->
+
+* `str` {String} String to encode.
+* `encoding` {String} Encoding to use, Default: `'utf8'`
+
+Creates a new `Buffer` containing the given JavaScript string `str`. If
+provided, the `encoding` parameter identifies the character encoding.
+If not provided, `encoding` defaults to `'utf8'`.
+
+```js
+const buf1 = Buffer.from('this is a tést');
+console.log(buf1.toString());
+  // prints: this is a tést
+console.log(buf1.toString('ascii'));
+  // prints: this is a tC)st
+
+const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
+console.log(buf2.toString());
+  // prints: this is a tést
+```
+
+A `TypeError` will be thrown if `str` is not a string.
+
+### Class Method: Buffer.alloc(size[, fill[, encoding]])
+<!-- YAML
+added: v5.10.0
+-->
+
+* `size` {Number}
+* `fill` {Value} Default: `undefined`
+* `encoding` {String} Default: `utf8`
+
+Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the
+`Buffer` will be *zero-filled*.
+
+```js
+const buf = Buffer.alloc(5);
+console.log(buf);
+  // <Buffer 00 00 00 00 00>
+```
+
+The `size` must be less than or equal to the value of
+`require('buffer').kMaxLength` (on 64-bit architectures, `kMaxLength` is
+`(2^31)-1`). Otherwise, a [`RangeError`][] is thrown. A zero-length Buffer will
+be created if a `size` less than or equal to 0 is specified.
+
+If `fill` is specified, the allocated `Buffer` will be initialized by calling
+`buf.fill(fill)`. See [`buf.fill()`][] for more information.
+
+```js
+const buf = Buffer.alloc(5, 'a');
+console.log(buf);
+  // <Buffer 61 61 61 61 61>
+```
+
+If both `fill` and `encoding` are specified, the allocated `Buffer` will be
+initialized by calling `buf.fill(fill, encoding)`. For example:
+
+```js
+const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
+console.log(buf);
+  // <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
+```
+
+Calling `Buffer.alloc(size)` can be significantly slower than the alternative
+`Buffer.allocUnsafe(size)` but ensures that the newly created `Buffer` instance
+contents will *never contain sensitive data*.
+
+A `TypeError` will be thrown if `size` is not a number.
+
+### Class Method: Buffer.allocUnsafe(size)
+<!-- YAML
+added: v5.10.0
+-->
+
+* `size` {Number}
+
+Allocates a new *non-zero-filled* `Buffer` of `size` bytes.  The `size` must
+be less than or equal to the value of `require('buffer').kMaxLength` (on 64-bit
+architectures, `kMaxLength` is `(2^31)-1`). Otherwise, a [`RangeError`][] is
+thrown. A zero-length Buffer will be created if a `size` less than or equal to
+0 is specified.
+
+The underlying memory for `Buffer` instances created in this way is *not
+initialized*. The contents of the newly created `Buffer` are unknown and
+*may contain sensitive data*. Use [`buf.fill(0)`][] to initialize such
+`Buffer` instances to zeroes.
+
+```js
+const buf = Buffer.allocUnsafe(5);
+console.log(buf);
+  // <Buffer 78 e0 82 02 01>
+  // (octets will be different, every time)
+buf.fill(0);
+console.log(buf);
+  // <Buffer 00 00 00 00 00>
+```
+
+A `TypeError` will be thrown if `size` is not a number.
+
+Note that the `Buffer` module pre-allocates an internal `Buffer` instance of
+size `Buffer.poolSize` that is used as a pool for the fast allocation of new
+`Buffer` instances created using `Buffer.allocUnsafe(size)` (and the deprecated
+`new Buffer(size)` constructor) only when `size` is less than or equal to
+`Buffer.poolSize >> 1` (floor of `Buffer.poolSize` divided by two). The default
+value of `Buffer.poolSize` is `8192` but can be modified.
+
+Use of this pre-allocated internal memory pool is a key difference between
+calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
+Specifically, `Buffer.alloc(size, fill)` will *never* use the internal Buffer
+pool, while `Buffer.allocUnsafe(size).fill(fill)` *will* use the internal
+Buffer pool if `size` is less than or equal to half `Buffer.poolSize`. The
+difference is subtle but can be important when an application requires the
+additional performance that `Buffer.allocUnsafe(size)` provides.
+
+### Class Method: Buffer.allocUnsafeSlow(size)
+<!-- YAML
+added: v5.10.0
+-->
+
+* `size` {Number}
+
+Allocates a new *non-zero-filled* and non-pooled `Buffer` of `size` bytes.  The
+`size` must be less than or equal to the value of
+`require('buffer').kMaxLength` (on 64-bit architectures, `kMaxLength` is
+`(2^31)-1`). Otherwise, a [`RangeError`][] is thrown. A zero-length Buffer will
+be created if a `size` less than or equal to 0 is specified.
+
+The underlying memory for `Buffer` instances created in this way is *not
+initialized*. The contents of the newly created `Buffer` are unknown and
+*may contain sensitive data*. Use [`buf.fill(0)`][] to initialize such
+`Buffer` instances to zeroes.
+
+When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
+allocations under 4KB are, by default, sliced from a single pre-allocated
+`Buffer`. This allows applications to avoid the garbage collection overhead of
+creating many individually allocated Buffers. This approach improves both
+performance and memory usage by eliminating the need to track and cleanup as
+many `Persistent` objects.
+
+However, in the case where a developer may need to retain a small chunk of
+memory from a pool for an indeterminate amount of time, it may be appropriate
+to create an un-pooled Buffer instance using `Buffer.allocUnsafeSlow()` then
+copy out the relevant bits.
+
+```js
+// need to keep around a few small chunks of memory
+const store = [];
+
+socket.on('readable', () => {
+  const data = socket.read();
+  // allocate for retained data
+  const sb = Buffer.allocUnsafeSlow(10);
+  // copy the data into the new allocation
+  data.copy(sb, 0, 0, 10);
+  store.push(sb);
+});
+```
+
+Use of `Buffer.allocUnsafeSlow()` should be used only as a last resort *after*
+a developer has observed undue memory retention in their applications.
+
+A `TypeError` will be thrown if `size` is not a number.
+
+### All the Rest
+
+The rest of the `Buffer` API is exactly the same as in node.js.
+[See the docs](https://nodejs.org/api/buffer.html).
+
+
+## Related links
+
+- [Node.js issue: Buffer(number) is unsafe](https://github.com/nodejs/node/issues/4660)
+- [Node.js Enhancement Proposal: Buffer.from/Buffer.alloc/Buffer.zalloc/Buffer() soft-deprecate](https://github.com/nodejs/node-eps/pull/4)
+
+## Why is `Buffer` unsafe?
+
+Today, the node.js `Buffer` constructor is overloaded to handle many different argument
+types like `String`, `Array`, `Object`, `TypedArrayView` (`Uint8Array`, etc.),
+`ArrayBuffer`, and also `Number`.
+
+The API is optimized for convenience: you can throw any type at it, and it will try to do
+what you want.
+
+Because the Buffer constructor is so powerful, you often see code like this:
+
+```js
+// Convert UTF-8 strings to hex
+function toHex (str) {
+  return new Buffer(str).toString('hex')
+}
+```
+
+***But what happens if `toHex` is called with a `Number` argument?***
+
+### Remote Memory Disclosure
+
+If an attacker can make your program call the `Buffer` constructor with a `Number`
+argument, then they can make it allocate uninitialized memory from the node.js process.
+This could potentially disclose TLS private keys, user data, or database passwords.
+
+When the `Buffer` constructor is passed a `Number` argument, it returns an
+**UNINITIALIZED** block of memory of the specified `size`. When you create a `Buffer` like
+this, you **MUST** overwrite the contents before returning it to the user.
+
+From the [node.js docs](https://nodejs.org/api/buffer.html#buffer_new_buffer_size):
+
+> `new Buffer(size)`
+>
+> - `size` Number
+>
+> The underlying memory for `Buffer` instances created in this way is not initialized.
+> **The contents of a newly created `Buffer` are unknown and could contain sensitive
+> data.** Use `buf.fill(0)` to initialize a Buffer to zeroes.
+
+(Emphasis our own.)
+
+Whenever the programmer intended to create an uninitialized `Buffer` you often see code
+like this:
+
+```js
+var buf = new Buffer(16)
+
+// Immediately overwrite the uninitialized buffer with data from another buffer
+for (var i = 0; i < buf.length; i++) {
+  buf[i] = otherBuf[i]
+}
+```
+
+
+### Would this ever be a problem in real code?
+
+Yes. It's surprisingly common to forget to check the type of your variables in a
+dynamically-typed language like JavaScript.
+
+Usually the consequences of assuming the wrong type is that your program crashes with an
+uncaught exception. But the failure mode for forgetting to check the type of arguments to
+the `Buffer` constructor is more catastrophic.
+
+Here's an example of a vulnerable service that takes a JSON payload and converts it to
+hex:
+
+```js
+// Take a JSON payload {str: "some string"} and convert it to hex
+var server = http.createServer(function (req, res) {
+  var data = ''
+  req.setEncoding('utf8')
+  req.on('data', function (chunk) {
+    data += chunk
+  })
+  req.on('end', function () {
+    var body = JSON.parse(data)
+    res.end(new Buffer(body.str).toString('hex'))
+  })
+})
+
+server.listen(8080)
+```
+
+In this example, an http client just has to send:
+
+```json
+{
+  "str": 1000
+}
+```
+
+and it will get back 1,000 bytes of uninitialized memory from the server.
+
+This is a very serious bug. It's similar in severity to the
+[the Heartbleed bug](http://heartbleed.com/) that allowed disclosure of OpenSSL process
+memory by remote attackers.
+
+
+### Which real-world packages were vulnerable?
+
+#### [`bittorrent-dht`](https://www.npmjs.com/package/bittorrent-dht)
+
+[Mathias Buus](https://github.com/mafintosh) and I
+([Feross Aboukhadijeh](http://feross.org/)) found this issue in one of our own packages,
+[`bittorrent-dht`](https://www.npmjs.com/package/bittorrent-dht). The bug would allow
+anyone on the internet to send a series of messages to a user of `bittorrent-dht` and get
+them to reveal 20 bytes at a time of uninitialized memory from the node.js process.
+
+Here's
+[the commit](https://github.com/feross/bittorrent-dht/commit/6c7da04025d5633699800a99ec3fbadf70ad35b8)
+that fixed it. We released a new fixed version, created a
+[Node Security Project disclosure](https://nodesecurity.io/advisories/68), and deprecated all
+vulnerable versions on npm so users will get a warning to upgrade to a newer version.
+
+#### [`ws`](https://www.npmjs.com/package/ws)
+
+That got us wondering if there were other vulnerable packages. Sure enough, within a short
+period of time, we found the same issue in [`ws`](https://www.npmjs.com/package/ws), the
+most popular WebSocket implementation in node.js.
+
+If certain APIs were called with `Number` parameters instead of `String` or `Buffer` as
+expected, then uninitialized server memory would be disclosed to the remote peer.
+
+These were the vulnerable methods:
+
+```js
+socket.send(number)
+socket.ping(number)
+socket.pong(number)
+```
+
+Here's a vulnerable socket server with some echo functionality:
+
+```js
+server.on('connection', function (socket) {
+  socket.on('message', function (message) {
+    message = JSON.parse(message)
+    if (message.type === 'echo') {
+      socket.send(message.data) // send back the user's message
+    }
+  })
+})
+```
+
+`socket.send(number)` called on the server, will disclose server memory.
+
+Here's [the release](https://github.com/websockets/ws/releases/tag/1.0.1) where the issue
+was fixed, with a more detailed explanation. Props to
+[Arnout Kazemier](https://github.com/3rd-Eden) for the quick fix. Here's the
+[Node Security Project disclosure](https://nodesecurity.io/advisories/67).
+
+
+### What's the solution?
+
+It's important that node.js offers a fast way to get memory otherwise performance-critical
+applications would needlessly get a lot slower.
+
+But we need a better way to *signal our intent* as programmers. **When we want
+uninitialized memory, we should request it explicitly.**
+
+Sensitive functionality should not be packed into a developer-friendly API that loosely
+accepts many different types. This type of API encourages the lazy practice of passing
+variables in without checking the type very carefully.
+
+#### A new API: `Buffer.allocUnsafe(number)`
+
+The functionality of creating buffers with uninitialized memory should be part of another
+API. We propose `Buffer.allocUnsafe(number)`. This way, it's not part of an API that
+frequently gets user input of all sorts of different types passed into it.
+
+```js
+var buf = Buffer.allocUnsafe(16) // careful, uninitialized memory!
+
+// Immediately overwrite the uninitialized buffer with data from another buffer
+for (var i = 0; i < buf.length; i++) {
+  buf[i] = otherBuf[i]
+}
+```
+
+
+### How do we fix node.js core?
+
+We sent [a PR to node.js core](https://github.com/nodejs/node/pull/4514) (merged as
+`semver-major`) which defends against one case:
+
+```js
+var str = 16
+new Buffer(str, 'utf8')
+```
+
+In this situation, it's implied that the programmer intended the first argument to be a
+string, since they passed an encoding as a second argument. Today, node.js will allocate
+uninitialized memory in the case of `new Buffer(number, encoding)`, which is probably not
+what the programmer intended.
+
+But this is only a partial solution, since if the programmer does `new Buffer(variable)`
+(without an `encoding` parameter) there's no way to know what they intended. If `variable`
+is sometimes a number, then uninitialized memory will sometimes be returned.
+
+### What's the real long-term fix?
+
+We could deprecate and remove `new Buffer(number)` and use `Buffer.allocUnsafe(number)` when
+we need uninitialized memory. But that would break 1000s of packages.
+
+~~We believe the best solution is to:~~
+
+~~1. Change `new Buffer(number)` to return safe, zeroed-out memory~~
+
+~~2. Create a new API for creating uninitialized Buffers. We propose: `Buffer.allocUnsafe(number)`~~
+
+#### Update
+
+We now support adding three new APIs:
+
+- `Buffer.from(value)` - convert from any type to a buffer
+- `Buffer.alloc(size)` - create a zero-filled buffer
+- `Buffer.allocUnsafe(size)` - create an uninitialized buffer with given size
+
+This solves the core problem that affected `ws` and `bittorrent-dht` which is
+`Buffer(variable)` getting tricked into taking a number argument.
+
+This way, existing code continues working and the impact on the npm ecosystem will be
+minimal. Over time, npm maintainers can migrate performance-critical code to use
+`Buffer.allocUnsafe(number)` instead of `new Buffer(number)`.
+
+
+### Conclusion
+
+We think there's a serious design issue with the `Buffer` API as it exists today. It
+promotes insecure software by putting high-risk functionality into a convenient API
+with friendly "developer ergonomics".
+
+This wasn't merely a theoretical exercise because we found the issue in some of the
+most popular npm packages.
+
+Fortunately, there's an easy fix that can be applied today. Use `safe-buffer` in place of
+`buffer`.
+
+```js
+var Buffer = require('safe-buffer').Buffer
+```
+
+Eventually, we hope that node.js core can switch to this new, safer behavior. We believe
+the impact on the ecosystem would be minimal since it's not a breaking change.
+Well-maintained, popular packages would be updated to use `Buffer.alloc` quickly, while
+older, insecure packages would magically become safe from this attack vector.
+
+
+## links
+
+- [Node.js PR: buffer: throw if both length and enc are passed](https://github.com/nodejs/node/pull/4514)
+- [Node Security Project disclosure for `ws`](https://nodesecurity.io/advisories/67)
+- [Node Security Project disclosure for`bittorrent-dht`](https://nodesecurity.io/advisories/68)
+
+
+## credit
+
+The original issues in `bittorrent-dht`
+([disclosure](https://nodesecurity.io/advisories/68)) and
+`ws` ([disclosure](https://nodesecurity.io/advisories/67)) were discovered by
+[Mathias Buus](https://github.com/mafintosh) and
+[Feross Aboukhadijeh](http://feross.org/).
+
+Thanks to [Adam Baldwin](https://github.com/evilpacket) for helping disclose these issues
+and for his work running the [Node Security Project](https://nodesecurity.io/).
+
+Thanks to [John Hiesey](https://github.com/jhiesey) for proofreading this README and
+auditing the code.
+
+
+## license
+
+MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org)

+declare module "safe-buffer" {
+  export class Buffer {
+    length: number
+    write(string: string, offset?: number, length?: number, encoding?: string): number;
+    toString(encoding?: string, start?: number, end?: number): string;
+    toJSON(): { type: 'Buffer', data: any[] };
+    equals(otherBuffer: Buffer): boolean;
+    compare(otherBuffer: Buffer, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
+    copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+    slice(start?: number, end?: number): Buffer;
+    writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUInt8(offset: number, noAssert?: boolean): number;
+    readUInt16LE(offset: number, noAssert?: boolean): number;
+    readUInt16BE(offset: number, noAssert?: boolean): number;
+    readUInt32LE(offset: number, noAssert?: boolean): number;
+    readUInt32BE(offset: number, noAssert?: boolean): number;
+    readInt8(offset: number, noAssert?: boolean): number;
+    readInt16LE(offset: number, noAssert?: boolean): number;
+    readInt16BE(offset: number, noAssert?: boolean): number;
+    readInt32LE(offset: number, noAssert?: boolean): number;
+    readInt32BE(offset: number, noAssert?: boolean): number;
+    readFloatLE(offset: number, noAssert?: boolean): number;
+    readFloatBE(offset: number, noAssert?: boolean): number;
+    readDoubleLE(offset: number, noAssert?: boolean): number;
+    readDoubleBE(offset: number, noAssert?: boolean): number;
+    swap16(): Buffer;
+    swap32(): Buffer;
+    swap64(): Buffer;
+    writeUInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
+    fill(value: any, offset?: number, end?: number): this;
+    indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
+
+    /**
+     * Allocates a new buffer containing the given {str}.
+     *
+     * @param str String to store in buffer.
+     * @param encoding encoding to use, optional.  Default is 'utf8'
+     */
+     constructor (str: string, encoding?: string);
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     */
+    constructor (size: number);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: Uint8Array);
+    /**
+     * Produces a Buffer backed by the same allocated memory as
+     * the given {ArrayBuffer}.
+     *
+     *
+     * @param arrayBuffer The ArrayBuffer with which to share memory.
+     */
+    constructor (arrayBuffer: ArrayBuffer);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: any[]);
+    /**
+     * Copies the passed {buffer} data onto a new {Buffer} instance.
+     *
+     * @param buffer The buffer to copy.
+     */
+    constructor (buffer: Buffer);
+    prototype: Buffer;
+    /**
+     * Allocates a new Buffer using an {array} of octets.
+     *
+     * @param array
+     */
+    static from(array: any[]): Buffer;
+    /**
+     * When passed a reference to the .buffer property of a TypedArray instance,
+     * the newly created Buffer will share the same allocated memory as the TypedArray.
+     * The optional {byteOffset} and {length} arguments specify a memory range
+     * within the {arrayBuffer} that will be shared by the Buffer.
+     *
+     * @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
+     * @param byteOffset
+     * @param length
+     */
+    static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
+    /**
+     * Copies the passed {buffer} data onto a new Buffer instance.
+     *
+     * @param buffer
+     */
+    static from(buffer: Buffer): Buffer;
+    /**
+     * Creates a new Buffer containing the given JavaScript string {str}.
+     * If provided, the {encoding} parameter identifies the character encoding.
+     * If not provided, {encoding} defaults to 'utf8'.
+     *
+     * @param str
+     */
+    static from(str: string, encoding?: string): Buffer;
+    /**
+     * Returns true if {obj} is a Buffer
+     *
+     * @param obj object to test.
+     */
+    static isBuffer(obj: any): obj is Buffer;
+    /**
+     * Returns true if {encoding} is a valid encoding argument.
+     * Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
+     *
+     * @param encoding string to test.
+     */
+    static isEncoding(encoding: string): boolean;
+    /**
+     * Gives the actual byte length of a string. encoding defaults to 'utf8'.
+     * This is not the same as String.prototype.length since that returns the number of characters in a string.
+     *
+     * @param string string to test.
+     * @param encoding encoding used to evaluate (defaults to 'utf8')
+     */
+    static byteLength(string: string, encoding?: string): number;
+    /**
+     * Returns a buffer which is the result of concatenating all the buffers in the list together.
+     *
+     * If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
+     * If the list has exactly one item, then the first item of the list is returned.
+     * If the list has more than one item, then a new Buffer is created.
+     *
+     * @param list An array of Buffer objects to concatenate
+     * @param totalLength Total length of the buffers when concatenated.
+     *   If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
+     */
+    static concat(list: Buffer[], totalLength?: number): Buffer;
+    /**
+     * The same as buf1.compare(buf2).
+     */
+    static compare(buf1: Buffer, buf2: Buffer): number;
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     * @param fill if specified, buffer will be initialized by calling buf.fill(fill).
+     *    If parameter is omitted, buffer will be filled with zeros.
+     * @param encoding encoding used for call to buf.fill while initalizing
+     */
+    static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
+    /**
+     * Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafe(size: number): Buffer;
+    /**
+     * Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafeSlow(size: number): Buffer;
+  }
+}
\ No newline at end of file

+/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
+/* eslint-disable node/no-deprecated-api */
+var buffer = require('buffer')
+var Buffer = buffer.Buffer
+
+// alternative to using Object.keys for old browsers
+function copyProps (src, dst) {
+  for (var key in src) {
+    dst[key] = src[key]
+  }
+}
+if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
+  module.exports = buffer
+} else {
+  // Copy properties from require('buffer')
+  copyProps(buffer, exports)
+  exports.Buffer = SafeBuffer
+}
+
+function SafeBuffer (arg, encodingOrOffset, length) {
+  return Buffer(arg, encodingOrOffset, length)
+}
+
+SafeBuffer.prototype = Object.create(Buffer.prototype)
+
+// Copy static methods from Buffer
+copyProps(Buffer, SafeBuffer)
+
+SafeBuffer.from = function (arg, encodingOrOffset, length) {
+  if (typeof arg === 'number') {
+    throw new TypeError('Argument must not be a number')
+  }
+  return Buffer(arg, encodingOrOffset, length)
+}
+
+SafeBuffer.alloc = function (size, fill, encoding) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  var buf = Buffer(size)
+  if (fill !== undefined) {
+    if (typeof encoding === 'string') {
+      buf.fill(fill, encoding)
+    } else {
+      buf.fill(fill)
+    }
+  } else {
+    buf.fill(0)
+  }
+  return buf
+}
+
+SafeBuffer.allocUnsafe = function (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  return Buffer(size)
+}
+
+SafeBuffer.allocUnsafeSlow = function (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  return buffer.SlowBuffer(size)
+}

+{
+  "name": "safe-buffer",
+  "description": "Safer Node.js Buffer API",
+  "version": "5.2.1",
+  "author": {
+    "name": "Feross Aboukhadijeh",
+    "email": "feross@feross.org",
+    "url": "https://feross.org"
+  },
+  "bugs": {
+    "url": "https://github.com/feross/safe-buffer/issues"
+  },
+  "devDependencies": {
+    "standard": "*",
+    "tape": "^5.0.0"
+  },
+  "homepage": "https://github.com/feross/safe-buffer",
+  "keywords": [
+    "buffer",
+    "buffer allocate",
+    "node security",
+    "safe",
+    "safe-buffer",
+    "security",
+    "uninitialized"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feross/safe-buffer.git"
+  },
+  "scripts": {
+    "test": "standard && tape test/*.js"
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}

+'use strict';
+
+module.exports = function (req, time) {
+	if (req.timeoutTimer) {
+		return req;
+	}
+
+	var delays = isNaN(time) ? time : {socket: time, connect: time};
+	var host = req._headers ? (' to ' + req._headers.host) : '';
+
+	if (delays.connect !== undefined) {
+		req.timeoutTimer = setTimeout(function timeoutHandler() {
+			req.abort();
+			var e = new Error('Connection timed out on request' + host);
+			e.code = 'ETIMEDOUT';
+			req.emit('error', e);
+		}, delays.connect);
+	}
+
+	// Clear the connection timeout timer once a socket is assigned to the
+	// request and is connected.
+	req.on('socket', function assign(socket) {
+		// Socket may come from Agent pool and may be already connected.
+		if (!(socket.connecting || socket._connecting)) {
+			connect();
+			return;
+		}
+
+		socket.once('connect', connect);
+	});
+
+	function clear() {
+		if (req.timeoutTimer) {
+			clearTimeout(req.timeoutTimer);
+			req.timeoutTimer = null;
+		}
+	}
+
+	function connect() {
+		clear();
+
+		if (delays.socket !== undefined) {
+			// Abort the request if there is no activity on the socket for more
+			// than `delays.socket` milliseconds.
+			req.setTimeout(delays.socket, function socketTimeoutHandler() {
+				req.abort();
+				var e = new Error('Socket timed out on request' + host);
+				e.code = 'ESOCKETTIMEDOUT';
+				req.emit('error', e);
+			});
+		}
+	}
+
+	return req.on('error', clear);
+};

+The MIT License (MIT)
+
+Copyright (c) Vsevolod Strukchinsky <floatdrop@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "timed-out",
+  "version": "4.0.1",
+  "description": "Emit `ETIMEDOUT` or `ESOCKETTIMEDOUT` when ClientRequest is hanged",
+  "license": "MIT",
+  "repository": "floatdrop/timed-out",
+  "author": {
+    "name": "Vsevolod Strukchinsky",
+    "email": "floatdrop@gmail.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "xo && mocha"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "http",
+    "https",
+    "get",
+    "got",
+    "url",
+    "uri",
+    "request",
+    "util",
+    "utility",
+    "simple"
+  ],
+  "devDependencies": {
+    "mocha": "*",
+    "xo": "^0.16.0"
+  }
+}

+# timed-out [![Build Status](https://travis-ci.org/floatdrop/timed-out.svg?branch=master)](https://travis-ci.org/floatdrop/timed-out)
+
+> Timeout HTTP/HTTPS requests
+
+Emit Error object with `code` property equal `ETIMEDOUT` or `ESOCKETTIMEDOUT` when ClientRequest is hanged.
+
+## Usage
+
+```js
+var get = require('http').get;
+var timeout = require('timed-out');
+
+var req = get('http://www.google.ru');
+timeout(req, 2000); // Set 2 seconds limit
+```
+
+### API
+
+#### timedout(request, time)
+
+##### request
+
+*Required*  
+Type: [`ClientRequest`](http://nodejs.org/api/http.html#http_class_http_clientrequest)
+
+The request to watch on.
+
+##### time
+
+*Required*  
+Type: `number` or `object`
+
+Time in milliseconds to wait for `connect` event on socket and also time to wait on inactive socket.
+
+Or you can pass Object with following fields:
+
+- `connect` - time to wait for connection
+- `socket`  - time to wait for activity on socket
+
+## License
+
+MIT © [Vsevolod Strukchinsky](floatdrop@gmail.com)

+'use strict';
+var uniqueRandom = require('unique-random');
+
+module.exports = function (arr) {
+	var rand = uniqueRandom(0, arr.length - 1);
+
+	return function () {
+		return arr[rand()];
+	};
+};

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "unique-random-array",
+  "version": "1.0.1",
+  "description": "Get consecutively unique elements from an array",
+  "keywords": [
+    "unique",
+    "uniq",
+    "random",
+    "rand",
+    "number",
+    "single",
+    "generate",
+    "non-repeating",
+    "array",
+    "arr",
+    "item",
+    "element"
+  ],
+  "license": "MIT",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "files": [
+    "index.js"
+  ],
+  "repository": "sindresorhus/unique-random-array",
+  "scripts": {
+    "test": "ava"
+  },
+  "dependencies": {
+    "unique-random": "^1.0.0"
+  },
+  "devDependencies": {
+    "ava": "*"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  }
+}

+# unique-random-array [![Build Status](https://travis-ci.org/sindresorhus/unique-random-array.svg?branch=master)](https://travis-ci.org/sindresorhus/unique-random-array)
+
+> Get consecutively unique elements from an array
+
+Useful for things like slideshows where you don't want to have the same slide twice in a row.
+
+
+## Install
+
+```sh
+$ npm install --save unique-random-array
+```
+
+
+## Usage
+
+```js
+var uniqueRandomArray = require('unique-random-array');
+var rand = uniqueRandomArray([1, 2, 3, 4]);
+
+console.log(rand(), rand(), rand(), rand());
+//=> 4 2 1 4
+```
+
+
+## API
+
+### uniqueRandomArray(input)
+
+Returns a function that when called will return a random element that's never the same as the previous.
+
+#### input
+
+*Required*  
+Type: `array`
+
+
+## Related
+
+- [unique-random](https://github.com/sindresorhus/unique-random) - Generate random numbers that are consecutively unique
+- [random-int](https://github.com/sindresorhus/random-int) - Generate a random integer
+- [random-float](https://github.com/sindresorhus/random-float) - Generate a random float
+- [random-item](https://github.com/sindresorhus/random-item) - Get a random item from an array
+- [random-obj-key](https://github.com/sindresorhus/random-obj-key) - Get a random key from an object
+- [random-obj-prop](https://github.com/sindresorhus/random-obj-prop) - Get a random property from an object
+- [crypto-random-string](https://github.com/sindresorhus/crypto-random-string) - Generate a cryptographically strong random string
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)

+'use strict';
+module.exports = function (min, max) {
+	var prev;
+	return function rand() {
+		var num = Math.floor(Math.random() * (max - min + 1) + min);
+		return prev = num === prev && min !== max ? rand() : num;
+	};
+};

+{
+  "name": "unique-random",
+  "version": "1.0.0",
+  "description": "Generate random numbers that are consecutively unique",
+  "keywords": [
+    "unique",
+    "random",
+    "rand",
+    "number",
+    "single",
+    "generate",
+    "non-repeating"
+  ],
+  "license": "MIT",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "http://sindresorhus.com"
+  },
+  "files": [
+    "index.js"
+  ],
+  "repository": "sindresorhus/unique-random",
+  "scripts": {
+    "test": "mocha"
+  },
+  "devDependencies": {
+    "mocha": "*"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  }
+}

+# unique-random [![Build Status](https://travis-ci.org/sindresorhus/unique-random.svg?branch=master)](https://travis-ci.org/sindresorhus/unique-random)
+
+> Generate random numbers that are consecutively unique.
+
+Useful for eg. slideshows where you don't want to have the same slide twice in a row.
+
+
+## Install
+
+```sh
+$ npm install --save unique-random
+```
+
+
+## Usage
+
+```js
+var rand = require('unique-random')(1, 10);
+console.log(rand(), rand(), rand());
+//=> 5 2 6
+```
+
+
+## API
+
+### uniqueRandom(*min*, *max*)
+
+Returns a function which when called will return a random number that's never the same as the previous number.
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)

+'use strict';
+const PassThrough = require('stream').PassThrough;
+const zlib = require('zlib');
+
+module.exports = res => {
+	// TODO: use Array#includes when targeting Node.js 6
+	if (['gzip', 'deflate'].indexOf(res.headers['content-encoding']) === -1) {
+		return res;
+	}
+
+	const unzip = zlib.createUnzip();
+	const stream = new PassThrough();
+
+	stream.httpVersion = res.httpVersion;
+	stream.headers = res.headers;
+	stream.rawHeaders = res.rawHeaders;
+	stream.trailers = res.trailers;
+	stream.rawTrailers = res.rawTrailers;
+	stream.setTimeout = res.setTimeout.bind(res);
+	stream.statusCode = res.statusCode;
+	stream.statusMessage = res.statusMessage;
+	stream.socket = res.socket;
+
+	unzip.on('error', err => {
+		if (err.code === 'Z_BUF_ERROR') {
+			stream.end();
+			return;
+		}
+
+		stream.emit('error', err);
+	});
+
+	res.pipe(unzip).pipe(stream);
+
+	return stream;
+};

+`The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "unzip-response",
+  "version": "2.0.1",
+  "description": "Unzip a HTTP response if needed",
+  "license": "MIT",
+  "repository": "sindresorhus/unzip-response",
+  "maintainers": [
+    {
+      "name": "Sindre Sorhus",
+      "email": "sindresorhus@gmail.com",
+      "url": "sindresorhus.com"
+    },
+    {
+      "name": "Vsevolod Strukchinsky",
+      "email": "floatdrop@gmail.com",
+      "url": "github.com/floatdrop"
+    }
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "http",
+    "unzip",
+    "zlib",
+    "gzip",
+    "deflate",
+    "incoming",
+    "message",
+    "response",
+    "stream"
+  ],
+  "devDependencies": {
+    "ava": "*",
+    "get-stream": "^2.3.0",
+    "pify": "^2.3.0",
+    "rfpify": "^1.0.0",
+    "xo": "*"
+  },
+  "xo": {
+    "esnext": true
+  }
+}

+# unzip-response [![Build Status](https://travis-ci.org/sindresorhus/unzip-response.svg?branch=master)](https://travis-ci.org/sindresorhus/unzip-response)
+
+> Unzip a HTTP response if needed
+
+Unzips the response from [`http.request`](https://nodejs.org/api/http.html#http_http_request_options_callback) if it's gzipped/deflated, otherwise just passes it through.
+
+
+## Install
+
+```
+$ npm install --save unzip-response
+```
+
+
+## Usage
+
+```js
+const http = require('http');
+const unzipResponse = require('unzip-response');
+
+http.get('http://sindresorhus.com', res => {
+	res = unzipResponse(res);
+});
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)

+'use strict';
+var url = require('url');
+var prependHttp = require('prepend-http');
+
+module.exports = function (x) {
+	var withProtocol = prependHttp(x);
+	var parsed = url.parse(withProtocol);
+
+	if (withProtocol !== x) {
+		parsed.protocol = null;
+	}
+
+	return parsed;
+};

+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

+{
+  "name": "url-parse-lax",
+  "version": "1.0.0",
+  "description": "url.parse() with support for protocol-less URLs & IPs",
+  "license": "MIT",
+  "repository": "sindresorhus/url-parse-lax",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "node test.js"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "url",
+    "uri",
+    "parse",
+    "parser",
+    "loose",
+    "lax",
+    "protocol",
+    "less",
+    "protocol-less",
+    "ip",
+    "ipv4",
+    "ipv6"
+  ],
+  "dependencies": {
+    "prepend-http": "^1.0.1"
+  },
+  "devDependencies": {
+    "ava": "0.0.4"
+  }
+}

+# url-parse-lax [![Build Status](https://travis-ci.org/sindresorhus/url-parse-lax.svg?branch=master)](https://travis-ci.org/sindresorhus/url-parse-lax)
+
+> [`url.parse()`](https://nodejs.org/docs/latest/api/url.html#url_url_parse_urlstr_parsequerystring_slashesdenotehost) with support for protocol-less URLs & IPs
+
+
+## Install
+
+```
+$ npm install --save url-parse-lax
+```
+
+
+## Usage
+
+```js
+var urlParseLax = require('url-parse-lax');
+
+urlParseLax('sindresorhus.com');
+/*
+{
+	protocol: null,
+	slashes: true,
+	auth: null,
+	host: 'sindresorhus.com',
+	port: null,
+	hostname: 'sindresorhus.com',
+	hash: null,
+	search: null,
+	query: null,
+	pathname: '/',
+	path: '/',
+	href: 'http://sindresorhus.com/'
+}
+*/
+
+urlParseLax('[2001:db8::]:8000');
+/*
+{
+	protocol: null,
+	slashes: true,
+	auth: null,
+	host: '[2001:db8::]:8000',
+	port: '8000',
+	hostname: '2001:db8::',
+	hash: null,
+	search: null,
+	query: null,
+	pathname: '/',
+	path: '/',
+	href: 'http://[2001:db8::]:8000/'
+}
+*/
+```
+
+And with the built-in `url.parse()`:
+
+```js
+var url = require('url');
+
+url.parse('sindresorhus.com');
+/*
+{
+	protocol: null,
+	slashes: null,
+	auth: null,
+	host: null,
+	port: null,
+	hostname: null,
+	hash: null,
+	search: null,
+	query: null,
+	pathname: 'sindresorhus',
+	path: 'sindresorhus',
+	href: 'sindresorhus'
+}
+*/
+
+url.parse('[2001:db8::]:8000');
+/*
+{
+	protocol: null,
+	slashes: null,
+	auth: null,
+	host: null,
+	port: null,
+	hostname: null,
+	hash: null,
+	search: null,
+	query: null,
+	pathname: '[2001:db8::]:8000',
+	path: '[2001:db8::]:8000',
+	href: '[2001:db8::]:8000'
+}
+*/
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)