[mutter] Bump version to 3.20.1

[Florian Müllner <fmuellner src gnome org>]

commit 588b8a163b7f5a9a57885e744679d3f1d48e3daf
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Apr 13 19:02:41 2016 +0200

    Bump version to 3.20.1
    
    Update NEWS.

 NEWS         |   13 +++++++++++++
 configure.ac |    2 +-
 2 files changed, 14 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 5450316..52c5ee8 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,16 @@
+3.20.1
+======
+* Constrain window move/resizes on wayland as on X11 [Rui; #748819]
+* Don't crash with invalid previous monitor configurations [Rui; #764286]
+* Misc. bug fixes and cleanups [Jonas, Cosimo; #762828, #764807]
+
+Contributors:
+  Jonas Ådahl, Cosimo Cecchi, Rui Matos, Jasper St. Pierre
+
+Translations:
+  Inaki Larranaga Murgoitio [eu], Reinout van Schouwen [nl], Fabio Tomat [fur],
+  Trần Ngọc Quân [vi]
+
 3.20.0
 ======
 * Fix crash when using visual bell [Jonas; #763858]
diff --git a/configure.ac b/configure.ac
index 5afce5f..24fd649 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ AC_PREREQ(2.62)
 
 m4_define([mutter_major_version], [3])
 m4_define([mutter_minor_version], [20])
-m4_define([mutter_micro_version], [0])
+m4_define([mutter_micro_version], [1])
 
 m4_define([mutter_version],
           [mutter_major_version.mutter_minor_version.mutter_micro_version])