bump tk version to fix default icon showing briefly

main.go

@@ -133,7 +133,6 @@ func repaint(img *tk.LabelWidget, name string, opt tk.Opt) {
 }
 
 func main() {
-	// TODO: see if there's a way to keep the "default" icon from flashing up on startup
 	tk.App.IconPhoto(tk.NewPhoto(tk.Data(icon)), tk.DefaultIcon())
 	img := tk.Label()
 	repaint(img, "", tk.Data(noise))