laravel/package.json

{
  "private": true,
  "scripts": {
    "prod": "gulp --production",
    "dev": "gulp watch"
  },
  "devDependencies": {
    "bootstrap-sass": "3.3.6",
    "gulp": "^3.9.1",
    "laravel-elixir": "^6.0.0-9",
    "laravel-elixir-rollup-official": "^1.0.4"
  }
}