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: Bas Couwenberg <email@example.com>
Date: Wed Apr 8 05:41:44 2020 +0200
Update gbp.conf to use --source-only-changes by default.