[gtksourceview] build: require GTK 4.4

[Christian Hergert <chergert src gnome org>]

commit 1f61a78075dff773a76e813bbdf0b73978217731
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jan 6 18:33:13 2022 -0800

    build: require GTK 4.4
    
    We effectively require this already.
    
    Related #244

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 0a3abd71..46cc1399 100644
--- a/meson.build
+++ b/meson.build
@@ -69,7 +69,7 @@ build_gtk_doc = get_option('gtk_doc')
 cc = meson.get_compiler('c')
 
 glib_req_version = '2.70'
-gtk_req_version = '4.2'
+gtk_req_version = '4.4'
 
 libm_dep = cc.find_library('m', required: false)