[wing] Post release version bump

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 5b9ee8e2025e9d79524b27a7cf02ef9a605964b0
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Thu Aug 19 10:28:40 2021 +0200

    Post release version bump

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index e9d8481..d5433ef 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project(
   'wing', 'c',
-  version: '0.3.8',
+  version: '0.3.9',
   default_options: [
     'buildtype=debugoptimized',
     'warning_level=2'