Updated main entry at package.json to work with WebPack

Author: Gusi

package.json

@@ -3,7 +3,7 @@
   "version": "1.5.7",
   "author": "Ghislain B.",
   "description": "Angular-Validation Directive and Service (ghiscoding)",
-  "main": "app.js",
+  "main": "dist/angular-validation.min",
   "dependencies": {},
   "devDependencies": {
     "del": "^1.2.1",