chore: Use strict types

Signed-off-by: Rubén D <nuxsmin@syspass.org>

lib/SP/Mvc/Controller/ExtensibleTabControllerInterface.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /*
  * sysPass
  *
@@ -37,4 +38,4 @@ interface ExtensibleTabControllerInterface extends ExtensibleControllerInterface
      * @param DataTab $tab
      */
     public function addTab(DataTab $tab);
-}
+}