Add main in package.json for compatibility with webpack

Author: HTMLGuyLLC

.DS_Store

@@ -1,7 +1,8 @@
 {
   "name": "jAlert",
-  "version": "4.8.0",
+  "version": "4.9.0",
   "description": "Simple jQuery (Modal | Popup | Lightbox | Alert) Plugin",
+  "main": "./dist/jAlert.min.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/HTMLGuyLLC/jAlert"