Add Assignment02

+const doSomethingAsync = () => {
+	return new Promise(resolve => {
+		setTimeout(() => resolve('I did something'), 3000)
+	})
+}
+
+// doSomething 함수를 async await 형태로 변경하시오
+const doSomething = () => {
+	doSomethingAsync().then( a =>  console.log(a))
+}
+
+console.log('Before')
+doSomething()
+console.log('After')