ver 42.alpha:
This version of gnome-bluetooth contains major API changes, but it is
parallel-installable with the GTK 3-based, 3.34.x versions of the
library.

- Port library to GTK4
- Remove chooser widgets from library
- Remove chooser UI from bluetooth-sendto
- Make bluetooth-sendto optional
- Replace canberra-gtk dependency with gsound
- GtkTreeModel-based API was replaced by a GListModel-based API
- Loads of bug fixes, many new tests
- Make changes to the way the default adapter is selected, see README.md
  for details