3.89.5.1 (unstable):
Distro packagers should probably not package this yet.

Gdk
* Pixbuf: get_pixels(): Const corrections.
  (Murray Cumming)

Gtk:
* FileChooserDialog:
  - Allow constructing with use-header-bar.
  - Remove constructors that take a backend parameter.
  (Daniel Boles) Bug #780004
* TreeView: More use of TreeModel::const_iterator instead of iterator,
  where appropriate.
  (Murray Cumming)

Build:
* Use glibmm-2.54 instead of glibmm-2.52.


3.89.5 (unstable):
Distro packagers should probably not package this yet.