ACP2E-1025: Declared strict types

Author: lakshmana49

dev/tests/integration/testsuite/Magento/User/Model/ValidateUserDateFieldsTest.php

@@ -3,6 +3,7 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
 
 namespace Magento\User\Model;