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: Sébastien Villemot <firstname.lastname@example.org>
Date: Thu Apr 25 15:51:19 2019 +0200
Drop transitional package liblapack-doc-man