sp-dev-fx-webparts/samples/js-extend-webpack/package.json

{
  "name": "js-extend-webpack",
  "version": "0.0.2",
  "private": true,
  "engines": {
    "node": ">=0.10.0"
  },
  "dependencies": {
    "@microsoft/sp-core-library": "~1.3.0",
    "@microsoft/sp-webpart-base": "~1.3.0",
    "@types/webpack-env": "1.13.1"
  },
  "devDependencies": {
    "@microsoft/sp-build-web": "1.3.0",
    "@microsoft/sp-module-interfaces": "1.3.0",
    "@microsoft/sp-webpart-workbench": "1.3.0",
    "gulp": "~3.9.1",
    "markdown-loader": "~2.0.1"
  },
  "scripts": {
    "build": "gulp bundle",
    "clean": "gulp clean",
    "test": "gulp test"
  }
}