2023-09-12  Kjell Ahlstedt  <kjellahlstedt@gmail.com>

  2.78.0

2023-09-12  Kjell Ahlstedt  <kjellahlstedt@gmail.com>

  Glib, Gio: Regenerate docs.xml and .defs files

  using glib files from glib 2.78.0.

2023-08-30  Kjell Ahlstedt  <kjellahlstedt@gmail.com>

  Glib::ustring: Add a std::hash<> specialization

  So people can use it as a key for std::unordered_map and
  std::unordered_set. Originally proposed by Murray Cumming.
  Add tests/glibmm_ustring_hash.
  Fixes #16

2023-08-29  Kjell Ahlstedt  <kjellahlstedt@gmail.com>

  Glib::VariantType docs: Update a link

  and change Gtk::Bin to Gtk::Widget. Gtk::Bin does not exist in gtkmm4.