[gnome-maps] configure.ac: Bump GTK+ required version

[Marcus Lundblad <mlundblad src gnome org>]

commit df02f2eb646c77814c558935cbc816ffcbf379a3
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Jan 16 22:14:52 2017 +0100

    configure.ac: Bump GTK+ required version
    
    Required for gtk_menu_popup_at_pointer().

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 90c2f5d..39eb085 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ AC_SUBST(GLIB_MKENUMS)
 GIO_MIN_VERSION=2.39.3
 GJS_MIN_VERSION=1.44.0
 GOBJECT_INTROSPECTION_MIN_VERSION=0.10.1
-GTK_MIN_VERSION=3.15.9
+GTK_MIN_VERSION=3.22.0
 GEOCLUE_MIN_VERSION=0.12.99
 
 PKG_CHECK_MODULES(GNOME_MAPS, [