Add onClosed Event

This will allow the IDE to suggest the onClosed method when chaining in HTML Editor.
Fixed issue with php stan.

Author: patricktorres27

src/Html/Editor/HasEvents.php

@@ -6,6 +6,7 @@
 
 /**
  * @method $this onClose($script)
+ * @method $this onClosed($script)
  * @method $this onCreate($script)
  * @method $this onDisplayOrder($script)
  * @method $this onEdit($script)