update new schema package

 import path from "path";
-import { makeExecutableSchema } from "graphql-tools";
-import { fileLoader, mergeResolvers, mergeTypes } from "merge-graphql-schemas";
+import { makeExecutableSchema } from "@graphql-tools/schema";
+import { mergeTypeDefs, mergeResolvers } from "@graphql-tools/merge";
+import { loadFilesSync } from "@graphql-tools/load-files";
 
-const allTypes = fileLoader(path.join(__dirname, "api/**/*.graphql"));
-const allResolvers = fileLoader(path.join(__dirname, "api/**/*.js"));
+const allTypes = loadFilesSync(path.join(__dirname, "api/**/*.graphql"));
+const allResolvers = loadFilesSync(path.join(__dirname, "api/**/*.js"));
 
 const schema = makeExecutableSchema({
-  typeDefs: mergeTypes(allTypes),
+  typeDefs: mergeTypeDefs(allTypes),
   resolvers: mergeResolvers(allResolvers),
 });