4.10.0 (stable):

Gdk:
* Add TextureDownloader
* Add enum MemoryFormat, identical to MemoryTexture::Format
* Texture: Add get_format()
  (Kjell Ahlstedt)

Gtk:
* VolumeButton: Deprecated
* ProgressBar: Deprecate property_ellipsize()
  (Kjell Ahlstedt)
* FileDialog: open_multiple_finish() and select_multiple_folders_finish()
  return std::vector<Glib::RefPtr<Gio::File>> instead of
  Glib::RefPtr<Gio::ListModel>.
  FileChooser: Deprecate get_files() and get_shortcut_folders().
  Add get_files2() and get_shortcut_folders2().
  (Kjell Ahlstedt) Issue #132
* FileDialog: Make open[_finish](), select_folder[_finish](),
  save[_finish](), open_multiple[_finish](),
  select_multiple_folders[_finish]() non-const.
* FontDialog: Make choose_family[_finish]() and
  choose_face[_finish]() non-const.
* Accessible: Add set_accessible_parent(), update_next_accessible_sibling()
* MenuButton: Add set/get/property_active().
* ScaleButton: Add get/property_active().
* SearchEntry: Add set/get_placeholder_text().
  (Kjell Ahlstedt)

Tests:
* Add filedialog test
  (Kjell Ahlstedt)

Build:
* Require gtk4 >= 4.10.0
  (Kjell Ahlstedt)