added peer deps

Author: PeterStaev

package.json

@@ -29,7 +29,11 @@
   ],
   "author": "Peter Staev <[email protected]>",
   "license": "Apache-2.0",
-
+  
+  "peerDependencies": {
+     "tns-core-modules": "^3.0.0 || ^3.0.0-rc.1"
+  },
+  
   "devDependencies": {
     "typescript": "~2.2.2",
     "tslint": "^4.5.1",
@@ -42,4 +46,4 @@
     "grunt-exec": "2.0.0"
   }
 
-}
+}