1.2.3
=====
- Prevent crash if client is not initialized
- Fix critical if network device does not exists
- Fix ::1 multicast
- client. Add getter for network mask

Bugs fixed in this release:
- https://gitlab.gnome.org/GNOME/gssdp/issues/5
- https://gitlab.gnome.org/GNOME/gssdp/issues/6

All contributors to this release:
- Jens Georg <[email protected]>