Update stubs

Author: phpstan-bot

stubs/ext/dom/DOMElement.php

@@ -12,6 +12,10 @@ public function __construct(string $qualifiedName, ?string $value = null, string
     public function getAttribute(string $qualifiedName)
     {
     }
+    #[\Since('8.3')]
+    public function getAttributeNames(): array
+    {
+    }
     /**
      * @tentative-return-type
      * @return string

stubs/ext/dom/DOMNode.php

@@ -110,4 +110,8 @@ public function replaceChild(DOMNode $node, DOMNode $child)
     public function contains(DOMNode|DOMNameSpaceNode|null $other): bool
     {
     }
+    #[\Since('8.3')]
+    public function getRootNode(?array $options = null): DOMNode
+    {
+    }
 }