Prepare release 0.6.3

Change-Id: Ie4bc2812544224110eb371e4dd096fc1681ab1f0
Refs: #4727
diff --git a/wscript b/wscript
index fa94ca3..e65ae22 100644
--- a/wscript
+++ b/wscript
@@ -3,7 +3,7 @@
 from waflib import Context, Logs, Utils
 import os, subprocess
 
-VERSION = '0.6.2'
+VERSION = '0.6.3'
 APPNAME = 'ndn-cxx'
 PACKAGE_BUGREPORT = 'https://redmine.named-data.net/projects/ndn-cxx'
 PACKAGE_URL = 'http://named-data.net/doc/ndn-cxx/'