Update python dependencies

Change-Id: Ic1ba3152160e9255d14ae66881e452a99930b0d8
diff --git a/repo-ng/debian/control b/repo-ng/debian/control
index e8e7da7..4faf4b1 100644
--- a/repo-ng/debian/control
+++ b/repo-ng/debian/control
@@ -2,7 +2,7 @@
 Priority: extra
 Maintainer: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 Build-Depends: debhelper (>= 9.20160709),
- python3 (>= 3.5.0),
+ python3 (>= 3.6.0),
  pkg-config (>= 0.26),
  libndn-cxx-dev (>= 0.8.0)
 Standards-Version: 3.9.2