4.9.3 (unstable):

Gdk:
* Display: Deprecate get_startup_notification_id().
* Monitor: Add get/property_description().
  (Kjell Ahlstedt)

Gtk:
* Deprecated classes: Assistant, AssistantPage, LockButton, Statusbar
* Gesture: Deprecate set_sequence_state().
* Accessible: Add enum Accessible::PlatformState. Add get_at_context(),
  get_platform_state(), get_accessible_parent(), get_bounds(),
  get_first_accessible_child(), get_next_accessible_sibling().
* Add ATContext and UriLauncher.
  (Kjell Ahlstedt)

Documentation:
* Gtk::Image, Picture, StringList, StringObject: Improve class descriptions
  (Kjell Ahlstedt)

Build:
* Require gtk4 >= 4.9.3
  (Kjell Ahlstedt)