[dconf-editor] Bump Gtk+ required version to 3.22.0.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 27d2d457e4ac9cb474b7c460a2227a75153fd831
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Thu Oct 20 00:24:57 2016 +0200

    Bump Gtk+ required version to 3.22.0.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4d88965..195714f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,7 +32,7 @@ APPSTREAM_XML
 # Dependencies
 DCONF_REQUIRED=0.25.1
 GLIB_REQUIRED=2.46.0
-GTK_REQUIRED=3.21.6
+GTK_REQUIRED=3.22.0
 
 PKG_CHECK_MODULES(DCONF_EDITOR, [
   glib-2.0 >= $GLIB_REQUIRED