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: NIIBE Yutaka <firstname.lastname@example.org>
Date: Thu Aug 15 16:53:09 2019 +0900
Signed-off-by: NIIBE Yutaka <email@example.com>