Prepare release 0.6.3

Change-Id: I004e5609f26186ad270bbe5f2015052a7c2be89a
Refs: #4727
diff --git a/wscript b/wscript
index d4da8c4..3a90311 100644
--- a/wscript
+++ b/wscript
@@ -26,7 +26,7 @@
 from waflib import Context, Logs, Utils
 import os, subprocess
 
-VERSION = '0.6.2'
+VERSION = '0.6.3'
 APPNAME = 'nfd'
 BUGREPORT = 'https://redmine.named-data.net/projects/nfd'
 URL = 'https://named-data.net/doc/NFD/'