fix: Disable the dump helper in the test bootstrapper

Author: bastianallgeier

tests/bootstrap.php

@@ -4,6 +4,8 @@
 
 error_reporting(E_ALL);
 
+define('KIRBY_HELPER_DUMP', false);
+
 ini_set('memory_limit', '512M');
 ini_set('display_errors', 'on');
 ini_set('display_startup_errors', 'on');