[libsecret] meson: Bump version to 0.20.0

[Daiki Ueno <dueno src gnome org>]

commit 00fae821eae610fbdbf2900494f7f69d32123406
Author: Daiki Ueno <dueno src gnome org>
Date:   Wed Jan 22 10:59:29 2020 +0100

    meson: Bump version to 0.20.0
    
    Fixes #37.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index bb58f68..6bfc9a1 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('libsecret', 'c',
-  version: '0.19.1',
+  version: '0.20.0',
   license: 'GPL2+',
   meson_version: '>= 0.50',
 )