[mutter] Bump version to 3.31.90

[Florian Müllner <fmuellner src gnome org>]

commit c91d9df481cbbddbb262a66056dd5efb205da3c9
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Feb 7 01:22:26 2019 +0100

    Bump version to 3.31.90
    
    Update NEWS.

 NEWS        | 25 +++++++++++++++++++++++++
 meson.build |  2 +-
 2 files changed, 26 insertions(+), 1 deletion(-)
---
diff --git a/NEWS b/NEWS
index b3b3cc144..cdfcae05d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,28 @@
+3.31.90
+=======
+* Fix support of extended characters in on-screen keyboard [Andrea; #109]
+* Improve selection of the primary GPU [Pekka, Emilio; !271]
+* Screen-cast cursor updates as PipeWire stream metadata [Jonas; !357]
+* Fix rendering glitches in magnifier [Daniel; gnome-shell#387]
+* Fix monitor recording on HiDPI [Jonas; !415]
+* Honour secondary GPU supported pixel formats [Pekka; !341]
+* Fall back to CPU copy path when using a software renderer [Emilio; !325]
+* Remove fallback app menu [Florian; gnome-shell#624]
+* wayland: Add support for viewporter protocol [Robert; !323]
+* Misc. bug fixes and cleanups [Florian, Carlos, Olivier, Marco, Robert,
+  Daniel, Pekka, Jonas, Ole, Georges; !391, #335, #442, !406, !395, #447,
+  !375, gnome-shell#349, #451, !416, #784199, !408, !181, !405]
+
+Contributors:
+  Jonas Ådahl, Andrea Azzarone, Ole Jørgen Brønner, Piotr Drąg, Olivier Fourdan,
+  Dariusz Gadomski, Carlos Garnacho, Antoine Jacoutot, Iain Lane, Robert Mader,
+  Emilio Pozuelo Monfort, Florian Müllner, Georges Basile Stavracas Neto,
+  Pekka Paalanen, Marco Trevisan (Treviño), Josh Triplett, Daniel van Vugt
+
+Translators:
+  Fabio Tomat [fur], Balázs Úr [hu], Daniel Mustieles [es], Kukuh Syafaat [id],
+  Jordi Mas [ca], Piotr Drąg [pl]
+
 3.31.4
 ======
 * keybindings: Limit corner move to current monitor [Jānis; #320]
diff --git a/meson.build b/meson.build
index b5076ca50..c3039466d 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('mutter', 'c',
-  version: '3.31.4',
+  version: '3.31.90',
   meson_version: '>= 0.48.0',
   license: 'GPLv2+'
 )