[atk] Bump up the version of ATK

[Emmanuele Bassi <ebassi src gnome org>]

commit b90ba45bb0baf61e06c06eac94b6f08b3dce864f
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Apr 30 15:18:11 2019 +0100

    Bump up the version of ATK
    
    New API landed, and at-spi2-atk now depends on ATK 2.33.1.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 8867161..3fec277 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('atk', 'c',
-        version: '2.31.92',
+        version: '2.33.1',
         license: 'LGPLv2.1+',
         default_options: [
           'buildtype=debugoptimized',