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: Alkis Georgopoulos <firstname.lastname@example.org>
Date: Thu Sep 12 09:08:42 2019 +0300
Build-Depend on debhelper >= 9, for older but still supported distributions