message: chore: add package.json keywords
diff: "version": "1.0.0",
  "description": "A serverless plugin for nextjs 8 serverless target",
  "main": "index.js",
  + "keywords": [
  + "serverless",
  + "nextjs",
  + "lambda",
  + "next",
  + "api gateway"
  + ],
  "scripts": {
  "coveralls": "jest --coverage && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
  "test": "jest"
  