2.66.5 (stable):

Gio:
* ListStore: Don't derive a gtkmm__GListStore GType
  (Kjell Ahlstedt) Issue glib#2661
* DBus::Proxy: get_connection(), get_interface_info(): Add refreturn
  (Kjell Ahlstedt) Issue #102 (우정모)

Documentation:
* Gio::Action: Improve the documentation
  (Kjell Ahlstedt) Issue #100 (Diederik van Lierop)

gmmproc:
* Improved handling of final types
  (Kjell Ahlstedt) Issue glib#2661

Build:
* Meson build: Avoid unnecessary configuration warnings
  (Kjell Ahlstedt)
* Meson/MSVC: Add more warnings to ignore
  (Chun-wei Fan)
* NMake Makefiles: Ensure g[lib|io]mm[config.h|.rc] are created
  (Chun-wei Fan) Issue #99 (Martin Ammermüller)