Fix return-types to return list instead of array

Author: tvdijen

src/XML/AbstractElement.php

@@ -143,7 +143,7 @@ public function getQualifiedName(): string
      * Extract localized names from the children of a given element.
      *
      * @param \DOMElement $parent The element we want to search.
-     * @return array<static> An array of objects of this class.
+     * @return list<static> An array of objects of this class.
      */
     public static function getChildrenOfClass(DOMElement $parent): array
     {

src/XML/ExtendableAttributesTrait.php

@@ -93,7 +93,7 @@ public function getAttributesNS(): array
      *
      * @param \DOMElement $xml
      * @param string|string[]|null $namespace
-     * @return array<int, \SimpleSAML\XML\Attribute>
+     * @return list<\SimpleSAML\XML\Attribute>
      */
     protected static function getAttributesNSFromXML(
         DOMElement $xml,