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: Arturo Borrero Gonzalez <email@example.com>
Date: Tue Jul 30 19:27:28 2019 +0200
iptables: no longer Priority: important
The package is now Priority: optional. This means it is not installed by
default in Debian.
See this debian-devel mailing list thread:
Signed-off-by: Arturo Borrero Gonzalez <firstname.lastname@example.org>