[mutter] Bump version to 3.20.0

[Florian Müllner <fmuellner src gnome org>]

commit 1d56aac156a4953d94a4db49938b5795b59cee64
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Mar 22 18:15:20 2016 +0100

    Bump version to 3.20.0
    
    Update NEWS.

 NEWS         |   10 ++++++++++
 configure.ac |    4 ++--
 2 files changed, 12 insertions(+), 2 deletions(-)
---
diff --git a/NEWS b/NEWS
index 15bb0fc..5450316 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,13 @@
+3.20.0
+======
+* Fix crash when using visual bell [Jonas; #763858]
+
+Contributors:
+  Jonas Ådahl, Jasper St. Pierre
+
+Translations:
+  Milo Casagrande [it], Ask Hjorth Larsen [da]
+
 3.19.92
 =======
 * Add system bell support on wayland [Jonas; #763284]
diff --git a/configure.ac b/configure.ac
index 9cdcd8b..5afce5f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,8 +1,8 @@
 AC_PREREQ(2.62)
 
 m4_define([mutter_major_version], [3])
-m4_define([mutter_minor_version], [19])
-m4_define([mutter_micro_version], [92])
+m4_define([mutter_minor_version], [20])
+m4_define([mutter_micro_version], [0])
 
 m4_define([mutter_version],
           [mutter_major_version.mutter_minor_version.mutter_micro_version])