[accerciser] gi: require gtk 3.0 and rsvg 2.0

[Samuel Thibault <sthibaul src gnome org>]

commit 97b6b7817122391caee19b41230a7598914c468c
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Mon Apr 1 18:21:15 2019 +0200

    gi: require gtk 3.0 and rsvg 2.0
    
    Fixes #3

 src/accerciser.in          | 1 +
 src/lib/accerciser/node.py | 1 +
 2 files changed, 2 insertions(+)
---
diff --git a/src/accerciser.in b/src/accerciser.in
index 4160b17..6661bb1 100755
--- a/src/accerciser.in
+++ b/src/accerciser.in
@@ -49,6 +49,7 @@ sys.path.insert(1, libs)
 #gnome.program_init('accerciser', '@VERSION@', 
 #                   properties=props, argv=['accerciser'] + sys.argv[1:])
 
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk as gtk
 # initialize threads
 # get global icon resources
diff --git a/src/lib/accerciser/node.py b/src/lib/accerciser/node.py
index 0d1b8cd..cbc319e 100644
--- a/src/lib/accerciser/node.py
+++ b/src/lib/accerciser/node.py
@@ -18,6 +18,7 @@ from gi.repository import Gdk as gdk
 from gi.repository import GLib
 from gi.repository import GObject
 from gi.repository.Gio import Settings as GSettings
+gi.require_version('Rsvg', '2.0')
 from gi.repository import Rsvg as rsvg
 import cairo
 import pyatspi