[gthumb] updated for version 3.12.0

[Paolo Bacchilega <paobac src gnome org>]

commit 1ab909b4754ae3f48d41ee466ca3f4ed5e732785
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Sep 19 17:49:45 2021 +0200

    updated for version 3.12.0

 NEWS        | 23 +++++++++++++++++++++++
 meson.build |  2 +-
 2 files changed, 24 insertions(+), 1 deletion(-)
---
diff --git a/NEWS b/NEWS
index a812374a..8efff0ae 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,26 @@
+version 3.12.0
+--------------
+
+ Bugs fixed:
+
+  * Fix memory leak when loading webp, jxl, avif images. (Jürg Billeter)
+  * Check if image is null before using it. (!189)
+  * Added a Flatpak manifest. (AsciiWolf)
+
+ New or updated application translations:
+
+  * Catalan (Jordi Mas)
+  * Finnish (Jiri Grönroos)
+  * Hungarian (Balázs Úr)
+  * Indonesian (Andika Triwidada)
+  * Lietuvių (Aurimas Černius)
+  * Swedish (Anders Jonsson)
+  * čeština (Marek Černocký)
+
+ New or updated manual translations:
+
+  * Spanish - Spain (Daniel Mustieles)
+
 version 3.11.4
 --------------
 
diff --git a/meson.build b/meson.build
index 2309499e..1647a55b 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('gthumb', ['c', 'cpp'],
   license : 'GPL2+',
-  version : '3.11.4',
+  version : '3.12.0',
   meson_version : '>=0.43'
 )