Hi Ben, I just uploaded python-lockfile 0.12.2-2~bpo8+1 to backports since I need it to backport python-schema-salad.
I would have loved to commit the changes to some team Git repository but you are using a repository outside git.debian.org. I'd consider it sensible if you would consider maintaining the package inside DPMT and the corresponding repository which enables easier contributions to the package. Kind regards Andreas. -- http://fam-tille.de