[gxml] Post release new version set to 0.21

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 4667f6e82e1c708b78e316630e709d1034bf6c27
Author: Daniel Espinosa <esodan gmail com>
Date:   Tue Aug 11 11:56:19 2020 -0500

    Post release new version set to 0.21

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 6b6d77a..d652743 100644
--- a/meson.build
+++ b/meson.build
@@ -1,4 +1,4 @@
-project('gxml', [ 'vala', 'c'], version : '0.20.0')
+project('gxml', [ 'vala', 'c'], version : '0.21.0')
 
 PROJECT_NAME = meson.project_name ()
 API_VERSION = '0.20'