fix: allow Debugbar to load with strict form request validation enabled

Author: fadez

src/Requests/AssetRequest.php

@@ -12,6 +12,8 @@ public function rules(): array
     {
         return [
             'type' => ['required', 'string', 'in:js,css'],
+            'mtime' => ['nullable'],
+            'hash' => ['nullable'],
         ];
     }
 }