use jquery from env

Most of the times the only thing user is ever going to override is the jQuery use, have it in the env is very convenient so one can override it dynamically by simply updating value in the file.

src/config/config.php

@@ -3,7 +3,7 @@
 return [
     //'default_namespace' => 'App\Widgets',
 
-    'use_jquery_for_ajax_calls' => false,
+    'use_jquery_for_ajax_calls' => env('ARRILOT_USE_JQUERY', false),
 
     /*
     * Set Ajax widget middleware