Update package.json to meet new NPM format

[gregrickaby]

Newer versions of NPM are throwing an error when running npm install.

Package.json should be something like this:

  "name": "_s",
  "version": "1.0.0",
  "description": "A plugin boilerplate for new custom BuddyPress projects for WebDevStudios.",
  "author": "WebDevStudios",
  "repository": {
  "type": "git",
  "url": "https://github.com/WebDevStudios/wd_s"
},
  "bugs": {
  "url": "https://github.com/WebDevStudios/wd_s/issues/"
},
  "keywords": [
  "wordpress"
],
  "devDependencies": {
    "css-parse": "latest",
    "glob": "latest",
    "grunt": "latest",
    "grunt-autoprefixer": "latest",
    "grunt-combine-mq": "latest",
    "grunt-contrib-clean": "latest",
    "grunt-contrib-concat": "latest",
    "grunt-contrib-connect": "latest",
    "grunt-contrib-cssmin": "latest",
    "grunt-contrib-imagemin": "latest",
    "grunt-contrib-jshint": "latest",
    "grunt-contrib-uglify": "latest",
    "grunt-contrib-watch": "latest",
    "grunt-csscomb": "latest",
    "grunt-githooks": "latest",
    "grunt-newer": "latest",
    "grunt-notify": "latest",
    "grunt-phpcs": "latest",
    "grunt-sass": "latest",
    "grunt-sassdoc": "latest",
    "grunt-shell": "latest",
    "grunt-spritesmith": "latest",
    "grunt-svgmin": "latest",
    "grunt-svgstore": "latest",
    "grunt-update-submodules": "latest",
    "grunt-wp-i18n": "latest",
    "load-grunt-tasks": "latest"
  },
  "license": "GPL-2.0+"
}