1.devDependencies

  "devDependencies": {
    "@babel/cli": "^7.4.4",
    "@babel/core": "^7.4.5",
    "@babel/preset-env": "^7.4.5",
    "babel-loader": "^8.0.6",
    "webpack": "^4.32.2",
    "webpack-cli": "^3.3.2"
  },
  "dependencies": {
    "@babel/polyfill": "^7.4.4"
  }