[gnome-shell-extensions] Bump version to 3.21.91

[Florian Müllner <fmuellner src gnome org>]

commit 229a624553e01c03c47a2833e042f4a5bd19a2ba
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Aug 30 00:28:43 2016 +0200

    Bump version to 3.21.91
    
    To go along GNOME Shell 3.21.91.

 NEWS         |    4 ++++
 configure.ac |    2 +-
 2 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 88645f1..0fd4a42 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+3.21.91
+=======
+* updated translations (pl)
+
 3.21.90
 =======
 * updated translations (es, gu)
diff --git a/configure.ac b/configure.ac
index 7e4fcf2..8b73f53 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.63)
-AC_INIT([gnome-shell-extensions],[3.21.90],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell&component=extensions])
+AC_INIT([gnome-shell-extensions],[3.21.91],[https://bugzilla.gnome.org/enter_bug.cgi?product=gnome-shell&component=extensions])
 
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_AUX_DIR([config])