Added missing declare strict_types

Author: ciastektk

src/contracts/Menu/AbstractActionBuilder.php

@@ -4,6 +4,7 @@
  * @copyright Copyright (C) Ibexa AS. All rights reserved.
  * @license For full copyright and license information view LICENSE file distributed with this source code.
  */
+declare(strict_types=1);
 
 namespace Ibexa\Contracts\AdminUi\Menu;
 

src/lib/Menu/Action/DraftListActionMenuBuilder.php

@@ -4,6 +4,7 @@
  * @copyright Copyright (C) Ibexa AS. All rights reserved.
  * @license For full copyright and license information view LICENSE file distributed with this source code.
  */
+declare(strict_types=1);
 
 namespace Ibexa\AdminUi\Menu\Action;
 

src/lib/Menu/Action/VersionListActionMenuBuilder.php

@@ -4,6 +4,7 @@
  * @copyright Copyright (C) Ibexa AS. All rights reserved.
  * @license For full copyright and license information view LICENSE file distributed with this source code.
  */
+declare(strict_types=1);
 
 namespace Ibexa\AdminUi\Menu\Action;