Fix XDOMPath::query() return type

Resolves phpstan/phpstan#13595

Author: stefanfisk

stubs/dom.stub

@@ -65,7 +65,7 @@ class DOMElement extends DOMNode
 }
 
 /**
- * @template-covariant TNode as DOMNode
+ * @template-covariant TNode as DOMNameSpaceNode|DOMNode
  * @implements IteratorAggregate<int, TNode>
  */
 class DOMNodeList implements IteratorAggregate, Countable
@@ -79,19 +79,6 @@ class DOMNodeList implements IteratorAggregate, Countable
 
 }
 
-class DOMXPath
-{
-
-    /**
-     * @param string $expression
-     * @param DOMNode|null $contextNode
-     * @param boolean $registerNodeNS
-     * @return DOMNodeList<DOMNode>|false
-     */
-    public function query($expression, $contextNode, $registerNodeNS) {}
-
-}
-
 class DOMAttr extends DOMNode
 {
 

tests/PHPStan/Analyser/nsrt/bug-6748.php

@@ -17,6 +17,6 @@ public function iterateNodes ($list): void
 	/** @param \DOMXPath $path */
 	public function xPathQuery ($path)
 	{
-		assertType('DOMNodeList<DOMNode>|false', $path->query(''));
+		assertType('DOMNodeList<DOMNameSpaceNode|DOMNode>|false', $path->query(''));
 	}
 }