[gegl] post release version bump

[Øyvind "pippin" Kolås <ok src gnome org>]

commit ca73bec99fe794ced06b85cb31ad06ce5d28ef4a
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Mar 27 20:15:43 2021 +0100

    post release version bump

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 3284ca0b0..c679bc7b8 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('gegl',
   'c', 'cpp',
   license: 'GPL3+',
-  version: '0.4.30',
+  version: '0.4.31',
   meson_version: '>=0.50.0',
   default_options: [
     'c_std=gnu11',