this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Ondřej Nový <email@example.com>
Date: Wed Aug 8 14:58:23 2018 +0200
d/control: Remove ancient X-Python3-Version field