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: Julian Andres Klode <firstname.lastname@example.org>
Date: Wed Nov 14 12:05:25 2018 +0100
Adjust libapt-pkg Breaks aptitude to << 0.8.9
The << 0.8.11 was stronger than necessary, and breaks Ubuntu,
which is unable to build aptitude 0.8.11 atm (the test suite
fails since 0.8.10 in C++17 mode, only works in C++14, but
0.8.11 uses C++17 constructs).