[clean] adding import in index

Author: Thanith

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@nutshelllab/aws-apollo-tools",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Aws apollo",
   "main": "lib/aws-apollo-tools.js",
   "scripts": {

src/index.js

@@ -1,5 +1,7 @@
 export { default as graphqlHttpRequest } from './http-request'
 export { default as graphqlLambdaRequest } from './lambda-request'
 export { default as createLambdaLink } from './lambda-link'
+export { default as withHeaders } from './link-with-headers'
+export { ApolloServer } from './apollo-server-lambda'
 export { default as hmacfetch } from './aws4-signer'
 export { default as formatError } from './format-error'