align package.json with npm standard

package.json

@@ -19,30 +19,38 @@
  "cordova-android",
  "cordova-ios"
  ],
- "engines": [
+ "engines": {
  {
  "name": "cordova",
  "version": ">=4.0.0"
  }
- ],
+ },
  "author": "Guy Rombaut <[email protected]>",
  "contributors": [
  {
+ "name": "Guy Rombaut",
+ "email": "[email protected]",
+ "url": "gsrweb.net",
  "username": "guyromb"
  },
  {
+ "name": "unknown",
  "username": "deefactorial"
  },
  {
+ "name": "unknown",
  "username": "selahssea"
  },
  {
+ "name": "unknown",
  "username": "asmund1"
  },
  {
+ "name": "unknown",
  "username": "perlish"
  },
  {
+ "name": "unknown",
  "username": "emcniece"
  }
  ],