[gnome-system-monitor] Prepared release 3.31.91

[Robert Roth <robertroth src gnome org>]

commit 33266f0a03c52a56abd824042e34b777cc558bc1
Author: Robert Roth <robert roth bee-tf ro>
Date:   Mon Feb 18 21:09:27 2019 +0200

    Prepared release 3.31.91

 NEWS        | 23 +++++++++++++++++++++++
 meson.build |  2 +-
 2 files changed, 24 insertions(+), 1 deletion(-)
---
diff --git a/NEWS b/NEWS
index 4e093ddb..e4d3c01c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,26 @@
+New in 3.31.91 - 18 February 2019
+
+* added/updated translations
+  Efstathios Iosifidis (el)
+  Yi-Jyun Pan (zh_TW)
+  Baurzhan Muftakhidinov (kk)
+  Fran Diéguez (gl)
+  Kukuh Syafaat (id)
+  Alan Mortensen (da)
+  Daniel Șerbănescu (ro)
+  Balázs Úr (hu)
+  Matej Urbančič (sl)
+  Emin Tufan (tr)
+  Marek Cernocky (cz)
+  Daniel Mustieles (es)
+  Piotr Drąg (pl)
+  Anders Jonsson (sv)
+  Jordi Mas (ca)
+  Jiri Grönroos (fi)
+
+List of fixed bugs
+  gitlab!5 - Sam Hewitt: updated application icon
+
 New in 3.31.90 - 4 February 2019
 
 * added/updated translations
diff --git a/meson.build b/meson.build
index afb11531..8be4bdd3 100644
--- a/meson.build
+++ b/meson.build
@@ -4,7 +4,7 @@ project('gnome-system-monitor',
   default_options : [
     'c_std=c11', 'cpp_std=c++11'
   ],
-  version: '3.31.90',
+  version: '3.31.91',
   meson_version: '>=0.43.0',
 )