message: Add prepblish hook
diff: "test": "jest",
  "start": "cross-env NODE_ENV=development rollup --config --watch",
  "build": "cross-env NODE_ENV=development rollup --config",
  + "prepublish": "npm run test && npm run lint && npm run build",
  "webpack": "webpack",
  "lint": "eslint ./src/**/*.js*",
  "prepublish": "npm run test && npm run lint && npm run build"
  