Update package.json

Make tns-core-modules peer dependency.
Make valid nativescript plugin.

Author: Vasil Chimev

package.json

@@ -14,7 +14,6 @@
   },
   "scripts": {},
   "dependencies": {
-    "tns-core-modules": "^2.0.0-angular-2",
     "nativescript-intl": "^0.0.2",
     "angular2": "2.0.0-beta.9",
     "es6-shim": "^0.33.3",
@@ -36,5 +35,9 @@
     "grunt-ts": "5.0.0-beta.5",
     "shelljs": "^0.5.3",
     "typescript": "1.8.2"
-  }
+  },
+  "peerDependencies": {
+    "tns-core-modules": ">=2.0.0 || >=2.0.0-2016 || >=2.0.0-angular-2"
+  },
+  "nativescript": {}
 }