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: Vincent Bernat <firstname.lastname@example.org>
Date: Mon Dec 9 06:40:39 2019 +0100
debian: make d/gbp.conf work with other gbp commands
Also, remove user-specific configuration settings.