4.21.1 (unstable) 2025-11-26

Gtk:
* Application: Add property_autosave_interval().
* Snapshot: Add push_blend(), push_mask(), push_copy(),
  append_scaled_texture(), append_paste().
* Namespace Accelerator: Add get_accessible_label().
  (Kjell Ahlstedt)

Build:
* Require gtk4 >= 4.21.2
  (Kjell Ahlstedt)