psync: Update

Change-Id: I986a2f3f8acc17bf0361d522f081f75f5ca79e76
diff --git a/libpsync/debian/control b/libpsync/debian/control
index 164d59c..797ee34 100644
--- a/libpsync/debian/control
+++ b/libpsync/debian/control
@@ -6,7 +6,7 @@
  pkg-config (>= 0.26),
  python-sphinx (>= 1.1.3),
  libboost-all-dev (>= 1.53.0),
- libndn-cxx-dev (>= 0.6.5),
+ libndn-cxx-dev (>= 0.6.6),
  git
 Standards-Version: 4.1.2
 Section: libs