feat: create version 2.x (#17)

Author: baocancode

README.md

@@ -1,6 +1,11 @@
 # joytocode/lighthouse-lambda
 Run [Google Chrome Lighthouse](https://github.com/GoogleChrome/lighthouse) on [AWS Lambda](https://aws.amazon.com/lambda/).
 
+## Versions
+Since 2.x, lighthouse-lambda has the same major version of lighthouse. For example, lighthouse-lambda 2.x will use lighthouse 2.x.
+
+This README is for version 2.x. To see version 3.x, visit https://github.com/joytocode/lighthouse-lambda/tree/v3.
+
 ## Installation
 
 ```bash

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "lighthouse-lambda",
-  "version": "1.1.5",
+  "version": "2.0.0",
   "description": "Run Google Chrome Lighthouse on AWS Lambda.",
   "engines": {
     "node": "8.10.x"