Correct type of SimpleXMLElement properties

Fixes phpstan/phpstan#2910

Author: AJenbo

src/Type/Php/SimpleXMLElementClassPropertyReflectionExtension.php

@@ -19,7 +19,7 @@ public function hasProperty(ClassReflection $classReflection, string $propertyNa
 
 	public function getProperty(ClassReflection $classReflection, string $propertyName): PropertyReflection
 	{
-		return new SimpleXMLElementProperty($classReflection, new ObjectType('SimpleXMLElement'));
+		return new SimpleXMLElementProperty($classReflection, new ObjectType($classReflection->getName()));
 	}
 
 }