message: Chore(package.json): add `private` field
diff: {
  "name": "react-cool-starter",
  "version": "3.15.0",
  + "private": true,
  "description": "A starter boilerplate for a universal web application with the best development experience and best practices.",
  "license": "MIT",
  "homepage": "https://github.com/wellyshen/react-cool-starter",
  