[meld] Post-release version bump

[Kai Willadsen <kaiw src gnome org>]

commit 0bab0435132965ccad47b5b6f7658017cbec262d
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Jan 6 10:30:48 2019 +1000

    Post-release version bump

 meld/conf.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meld/conf.py b/meld/conf.py
index ec7a2462..fb65797c 100644
--- a/meld/conf.py
+++ b/meld/conf.py
@@ -3,7 +3,7 @@ import os
 import sys
 
 __package__ = "meld"
-__version__ = "3.20.0"
+__version__ = "3.21.0"
 
 APPLICATION_ID = "org.gnome.meld"