[Rector] Applied all Symfony 5.x rectors to the production codebase

Applied rules:
 * AddReturnTypeDeclarationRector
 * AnnotationToAttributeRector

src/bundle/Form/Data/SearchData.php

@@ -18,11 +18,8 @@ class SearchData
 {
     /**
      * @var int
-     *
-     * @Assert\Range(
-     *     max = 1000
-     * )
      */
+    #[Assert\Range(max: 1000)]
     private $limit;
 
     /** @var int */

src/bundle/Form/Type/ContentTypeChoiceType.php

@@ -30,7 +30,7 @@ public function __construct(
         $this->contentTypeChoiceLoader = $contentTypeChoiceLoader;
     }
 
-    public function getParent()
+    public function getParent(): ?string
     {
         return ChoiceType::class;
     }

src/lib/View/SearchViewFilter.php

@@ -51,7 +51,7 @@ public function __construct(
         $this->urlGenerator = $urlGenerator;
     }
 
-    public static function getSubscribedEvents()
+    public static function getSubscribedEvents(): array
     {
         return [ViewEvents::FILTER_BUILDER_PARAMETERS => 'handleSearchForm'];
     }