[gnome-contacts] Meson: Bump gtk+-3.0 to 3.23.1

[Niels De Graef <nielsdg src gnome org>]

commit 131be8d64e1ba13ce9a1f8cf0c34a32fc79e5007
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Thu Aug 23 20:17:59 2018 +0200

    Meson: Bump gtk+-3.0 to 3.23.1
    
    This is the first version to offer the 'use-markup' property for
    Gtk.ModelButton, which is going to be used in the next commit.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index af2ac7a..9940d0c 100644
--- a/meson.build
+++ b/meson.build
@@ -48,7 +48,7 @@ glib = dependency('glib-2.0', version: '>=' + min_glib_version)
 gmodule_export = dependency('gmodule-export-2.0', version: '>=' + min_glib_version)
 gnome_desktop = dependency('gnome-desktop-3.0')
 goa = dependency('goa-1.0')
-gtk = dependency('gtk+-3.0', version: '>= 3.22.0')
+gtk = dependency('gtk+-3.0', version: '>= 3.23.1')
 libebook = dependency('libebook-1.2', version: '>=' + min_eds_version)
 libedataserver = dependency('libedataserver-1.2', version: '>=' + min_eds_version)
 libedataserverui = dependency('libedataserverui-1.2', version: '>=' + min_eds_version)