[amtk] Bump version for new development cycle

[Sébastien Wilmet <swilmet src gnome org>]

commit 3cdd10ee21dbfcb232b499bc53b7ad1f85a2eb4a
Author: Sébastien Wilmet <swilmet informatique-libre be>
Date:   Sat May 28 14:34:55 2022 +0200

    Bump version for new development cycle

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 70a5c2e..645f0d9 100644
--- a/meson.build
+++ b/meson.build
@@ -6,7 +6,7 @@
 project(
   'amtk', 'c',
   meson_version: '>= 0.53',
-  version: '5.4.2',
+  version: '5.5.0',
   default_options: ['warning_level=2']
 )