Version 5.0.0 release

system/Widget/Widget.php

@@ -35,6 +35,7 @@ use IPS\Platform\Bridge;
 use IPS\Widget\Area;
 use IPS\Widget\Builder;
 use IPS\Widget\Customizable;
+use IPS\Widget\Polymorphic;
 use OutOfRangeException;
 use Throwable;
 use UnderflowException;