A basic package.json file for a WordPress plugin.

package.json

{
  "name": "ProjectName",
  "version": "1.0.0",
  "description": "This plugin is incredible.",
  "repository": {
    "type": "git",
    "url": "https://github.com/username/repository"
  },
  "author": "Thats you!",
  "license": "GPLv2 or later",
  "devDependencies": {
    "grunt": "~0.4",
    "grunt-autoprefixer": "~1.0",
    "grunt-contrib-uglify": "~0.5",
    "grunt-contrib-watch": "~0.6",
    "grunt-contrib-sass": "~0.8",
    "grunt-contrib-copy": "~0.6",
    "grunt-notify": "~0.4",
    "matchdep": "~0.3"
  }
}