Revert "Rename `filter_class` to `filterset_class`"
Revert "Rename `filter_class` to `filterset_class`"

This reverts commit 1c25b44b56743f62a55a433c87d83a65374de9fd.

dbinetti/barberscore,dbinetti/barberscore,barberscore/barberscore-api,barberscore/barberscore-api,dbinetti/barberscore-django,barberscore/barberscore-api,dbinetti/barberscore-django,barberscore/barberscore-api