gdk: expose EventKind
fixes
@@ -106,7 +106,7 @@ pub use button_event::ButtonEvent;
pub use crossing_event::CrossingEvent;
pub use delete_event::DeleteEvent;
pub use dnd_event::DNDEvent;
-pub use event::{Event, NONE_EVENT};
+pub use event::{Event, EventKind, NONE_EVENT};
pub use focus_event::FocusEvent;
pub use grab_broken_event::GrabBrokenEvent;
pub use key_event::KeyEvent;
