[gnome-tweak-tool] Add missing gi.require_version() calls

[Rui Matos <rtcm src gnome org>]

commit 849b2678692415085fb1b3303d3952bc612a7e1e
Author: Rui Matos <tiagomatos gmail com>
Date:   Wed Nov 11 18:50:25 2015 +0100

    Add missing gi.require_version() calls
    
    pygobject now warns if we don't explicitly require a version before
    importing. This adds the missing calls where appropriate.
    
    For the pygobject change see
    https://bugzilla.gnome.org/show_bug.cgi?id=727379 .
    
    https://bugzilla.gnome.org/show_bug.cgi?id=757537

 gtweak/egowrapper.py             |    3 +++
 gtweak/tweaks/tweak_group_xkb.py |    2 ++
 gtweak/utils.py                  |    2 ++
 3 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gtweak/egowrapper.py b/gtweak/egowrapper.py
index 24930e2..738172a 100644
--- a/gtweak/egowrapper.py
+++ b/gtweak/egowrapper.py
@@ -18,6 +18,9 @@
 import json
 import logging
 
+import gi
+gi.require_version("Soup", "2.4")
+gi.require_version("SoupGNOME", "2.4")
 from gi.repository import GObject
 from gi.repository import Soup, SoupGNOME
 
diff --git a/gtweak/tweaks/tweak_group_xkb.py b/gtweak/tweaks/tweak_group_xkb.py
index 7b16829..2a0fc88 100644
--- a/gtweak/tweaks/tweak_group_xkb.py
+++ b/gtweak/tweaks/tweak_group_xkb.py
@@ -19,6 +19,8 @@
 
 import logging
 
+import gi
+gi.require_version("GnomeDesktop", "3.0")
 from gi.repository import Pango, Gtk, GnomeDesktop
 from gtweak.gshellwrapper import GnomeShellFactory
 from gtweak.tweakmodel import Tweak, TweakGroup
diff --git a/gtweak/utils.py b/gtweak/utils.py
index 6632ad9..6e4d701 100644
--- a/gtweak/utils.py
+++ b/gtweak/utils.py
@@ -25,6 +25,8 @@ import glob
 import gtweak
 from gtweak.gsettings import GSettingsSetting
 
+import gi
+gi.require_version("Notify", "0.7")
 from gi.repository import GObject
 from gi.repository import GLib
 from gi.repository import Gio