Prepare release 0.6.6

Change-Id: I2896cf769547e7afbedcc4f00bf28b48e0729426
Refs: #4916
diff --git a/wscript b/wscript
index 9da459b..462e083 100644
--- a/wscript
+++ b/wscript
@@ -3,7 +3,7 @@
 from waflib import Context, Logs, Utils
 import os, subprocess
 
-VERSION = '0.6.5'
+VERSION = '0.6.6'
 APPNAME = 'ndn-cxx'
 PACKAGE_BUGREPORT = 'https://redmine.named-data.net/projects/ndn-cxx'
 PACKAGE_URL = 'http://named-data.net/doc/ndn-cxx/'