[gssdp] Prepare 1.2.3

[Jens Georg <jensgeorg src gnome org>]

commit a4eb74313a3df17c3ac5b99f3131522e6e8bccf4
Author: Jens Georg <mail jensge org>
Date:   Mon Jun 22 23:49:43 2020 +0200

    Prepare 1.2.3

 NEWS | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/NEWS b/NEWS
index 9d6a0c4..26284c8 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,17 @@
+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 <mail jensge org>
+
 1.2.2
 =====
  - Fix macOS dylib versioning