Update python dependencies

Change-Id: Ic1ba3152160e9255d14ae66881e452a99930b0d8
diff --git a/ndn-traffic-generator/debian/control b/ndn-traffic-generator/debian/control
index f665f97..5def508 100644
--- a/ndn-traffic-generator/debian/control
+++ b/ndn-traffic-generator/debian/control
@@ -2,7 +2,7 @@
 Priority: extra
 Maintainer: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 Build-Depends: debhelper (>= 8.0.0),
- python3 (>= 3.5.0),
+ python3 (>= 3.6.0),
  pkg-config (>= 0.26),
  libndn-cxx-dev (>= 0.8.0)
 Standards-Version: 3.9.2