Merge tag '2.3.1'

Hotfix release 2.3.1

Fix deprecations

src/ContaoManager/Plugin.php

@@ -3,7 +3,7 @@
 /**
  * This file is part of contao-community-alliance/contao-multicolumnwizard-frontend-bundle.
  *
- * (c) 2020 Contao Community Alliance.
+ * (c) 2020-2024 Contao Community Alliance.
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -14,7 +14,7 @@
  * @author     Richard Henkenjohann <[email protected]>
  * @author     Stefan Heimes <[email protected]>
  * @author     Ingolf Steinhardt <[email protected]>
- * @copyright  2020 Contao Community Alliance.
+ * @copyright  2020-2024 Contao Community Alliance.
  * @license    https://github.com/contao-community-alliance/contao-multicolumnwizard-frontend-bundle/blob/master/LICENSE
  *             LGPL-3.0-or-later
  * @filesource
@@ -38,7 +38,7 @@ class Plugin implements BundlePluginInterface
     /**
      * {@inheritdoc}
      */
-    public function getBundles(ParserInterface $parser)
+    public function getBundles(ParserInterface $parser): array
     {
         return [
             BundleConfig::create(MultiColumnWizardFrontendBundle::class)