Fix new-parens rule in es5

[MAILPOET-1143]

assets/js/src/settings/tabs.js

@@ -80,7 +80,7 @@ define(
           }
         );
       }
-    }));
+    }))();
 
     jQuery(document).ready(function () {
       if (!Backbone.History.started) Backbone.history.start();

assets/js/src/subscribers/importExport/import.js

@@ -36,7 +36,7 @@ define(
           home: function () {
             this.navigate('step1', { trigger: true });
           }
-        }));
+        }))();
 
         function showCurrentStep() {
           MailPoet.Notice.hide();