The package has a debian/watch file, but the last attempt
to use it for checking for newer upstream versions failed with
an error:
In debian/watch no matching files for watch line https://github.com/bluesabre/mugshot/releases (?:.*/|)mugshot(?:-|_|_v|\.|V|)(\d\S*)\.(?:tar\.(?:gz|bz2|xz)|tgz|tbz2|txz|zip)