[gtksourceview] build: fix GTK version check

[Christian Hergert <chergert src gnome org>]

commit 03bbd109938bb26ccb712fc0df13f35d9ddd8f72
Author: Christian Hergert <chergert redhat com>
Date:   Fri Apr 9 08:14:50 2021 -0700

    build: fix GTK version check

 meson.build | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/meson.build b/meson.build
index 0cb4bf8c..aed58b4f 100644
--- a/meson.build
+++ b/meson.build
@@ -118,10 +118,9 @@ glib_version_arr = glib_req_version.split('.')
 glib_major_version = glib_version_arr[0]
 glib_minor_version = glib_version_arr[1]
 
-# XXX: Override until GTK 4 is released
 gtk_version_arr = gtk_req_version.split('.')
-gtk_major_version = '4' # gtk_version_arr[0]
-gtk_minor_version = '0' # gtk_version_arr[1]
+gtk_major_version = gtk_version_arr[0]
+gtk_minor_version = gtk_version_arr[1]
 
 # Configurations
 add_project_arguments([