backports murph-skeleton

core/Bundle/CoreBundle.php

@@ -13,10 +13,11 @@ namespace App\Core\Bundle;
 
 use App\Core\DependencyInjection\CoreExtension;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 
 class CoreBundle extends Bundle
 {
-    public function getContainerExtension()
+    public function getContainerExtension(): ?ExtensionInterface
     {
         return new CoreExtension();
     }

core/Form/FileManager/FileUploadType.php

@@ -21,9 +21,6 @@ class FileUploadType extends AbstractType
                 'required' => true,
                 'multiple' => true,
                 'attr' => [
-                    'webkitdirectory' => '',
-                    'directory' => '',
-                    'mozdirectory' => '',
                 ],
                 'constraints' => [
                     new All([