[gtksourceview] build: bump version for development

[Christian Hergert <chergert src gnome org>]

commit ea17fc642267c4b7882928d618a7342625207b87
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 11 14:56:46 2021 -0700

    build: bump version for development

 meson.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index c9a8d4d4..7d14bc80 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('gtksourceview', 'c',
-          version: '5.2.0',
+          version: '5.3.0',
           license: 'LGPL-2.1-or-later',
     meson_version: '>= 0.53.0',
   default_options: [ 'c_std=gnu99',
@@ -68,7 +68,7 @@ build_gtk_doc = get_option('gtk_doc')
 cc = meson.get_compiler('c')
 
 glib_req_version = '2.66'
-gtk_req_version = '4.2'
+gtk_req_version = '4.4'
 
 libm_dep = cc.find_library('m', required: false)