Fix error in Production Mode bundling js

Uncaught ReferenceError: IASSpinnerExtension is not defined
#1

Author: alothemes

view/frontend/web/js/plugins/infinitescroll.js

@@ -1429,4 +1429,6 @@ IASTriggerExtension.prototype.defaults = {
  * @type {number}
  */
 IASTriggerExtension.prototype.priority = 1000;
-}
+}
+
+window.IASCallbacks=IASCallbacks;window.IASHistoryExtension=IASHistoryExtension;window.IASTriggerExtension=IASTriggerExtension;window.IASSpinnerExtension=IASSpinnerExtension;window.IASPagingExtension=IASPagingExtension;window.IASNoneLeftExtension=IASNoneLeftExtension;