为什么我的package里内容是这样？

{
  "name": "learnangular",
  "private": true,
  "devDependencies": {
    "autoprefixer-core": "^5.2.1",
    "grunt": "^0.4.5",
    "grunt-angular-templates": "^0.5.7",
    "grunt-concurrent": "^1.0.0",
    "grunt-contrib-clean": "^0.6.0",
    "grunt-contrib-compass": "^1.0.0",
    "grunt-contrib-concat": "^0.5.0",
    "grunt-contrib-connect": "^0.9.0",
    "grunt-contrib-copy": "^0.7.0",
    "grunt-contrib-cssmin": "^0.12.0",
    "grunt-contrib-htmlmin": "^0.4.0",
    "grunt-contrib-imagemin": "^1.0.0",
    "grunt-contrib-jshint": "^0.11.0",
    "grunt-contrib-uglify": "^0.7.0",
    "grunt-contrib-watch": "^0.6.1",
    "grunt-filerev": "^2.1.2",
    "grunt-google-cdn": "^0.4.3",
    "grunt-jscs": "^1.8.0",
    "grunt-newer": "^1.1.0",
    "grunt-ng-annotate": "^0.9.2",
    "grunt-postcss": "^0.5.5",
    "grunt-svgmin": "^2.0.0",
    "grunt-usemin": "^3.0.0",
    "grunt-wiredep": "^2.0.0",
    "jit-grunt": "^0.9.1",
    "time-grunt": "^1.0.0",
    "jshint-stylish": "^1.0.0"
  },
  "engines": {
    "node": ">=0.10.0"
  }
}