[gnome-backgrounds] prepare for 3.31.91 release

[Jakub Steiner <jimmac src gnome org>]

commit f60a8b98f94b4292c935c4d4b08155a23dee7ac5
Author: Jakub Steiner <jimmac gmail com>
Date:   Tue Feb 19 17:26:54 2019 +0100

    prepare for 3.31.91 release

 NEWS        | 6 ++++++
 meson.build | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)
---
diff --git a/NEWS b/NEWS
index f8c289d..8f27ba3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+===============
+Version 3.31.91
+===============
+
+- new default & supplemental updates
+
 ===============
 Version 3.30.0
 ===============
diff --git a/meson.build b/meson.build
index a3a2057..e68d335 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('gnome-backgrounds',
-  version: '3.30.0',
+  version: '3.31.91',
   meson_version: '>= 0.41.0'
 )