Fix namespace and add missing return typehint

Author: jordisala1991

src/Command/ReleaseCommand.php

@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-namespace Sonata\DevKit\Console\Command;
+namespace App\Command;
 
 use Github\Exception\ExceptionInterface;
 use Github\Exception\RuntimeException;
@@ -37,10 +37,7 @@ final class ReleaseCommand extends AbstractCommand
         'pedantic' => 'yellow',
     );
 
-    /**
-     * {@inheritdoc}
-     */
-    protected function configure()
+    protected function configure(): void
     {
         parent::configure();