[grilo-plugins] Post-release version bump to 0.3.12

[Victor Toso <victortoso src gnome org>]

commit 2adc426186d6d450852442e3802e89e3c9fedfa6
Author: Victor Toso <me victortoso com>
Date:   Fri Feb 14 15:56:28 2020 +0100

    Post-release version bump to 0.3.12

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 5efbeebc..d5c052d0 100644
--- a/meson.build
+++ b/meson.build
@@ -6,7 +6,7 @@
 # Copyright (C) 2016 Igalia S.L. All rights reserved.
 
 project('grilo-plugins', 'c',
-        version: '0.3.11',
+        version: '0.3.12',
         default_options: [
             'buildtype=debugoptimized',
             'c_std=gnu99',