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: Ulrike Uhlig <firstname.lastname@example.org>
Date: Mon Nov 5 18:21:43 2018 +0100
Debian bug #814190: make it clear that policykit-1 is needed and
/polkit-gnome-authentication-agent-1 needs to be running for
tails-installer to work in minimalistic desktop environments.