fix: native typehint

Author: VincentLanglet

src/Metadata/ApiProperty.php

@@ -610,10 +610,8 @@ public function withIris(string|array $iris): static
 
     /**
      * Whether to generate a skolem iri on anonymous resources.
-     *
-     * @return bool|null
      */
-    public function getGenId()
+    public function getGenId(): ?bool
     {
         return $this->genId;
     }

src/Metadata/HttpOperation.php

@@ -30,11 +30,11 @@ class HttpOperation extends Operation
     public const METHOD_OPTIONS = 'OPTIONS';
 
     /** @var array<int|string, string|string[]>|null */
-    protected ?array $formats;
+    protected $formats;
     /** @var array<int|string, string|string[]>|null */
-    protected ?array $inputFormats;
+    protected $inputFormats;
     /** @var array<int|string, string|string[]>|null */
-    protected ?array $outputFormats;
+    protected $outputFormats;
 
     /**
      * @param string[]|null                                  $types         the RDF types of this property