Consider dropping marshmallow_enum from dependencies #202
Description
The project seems to be abandoned (no change since 2019), and has potential to break things in the future, with PRs like this justanr/marshmallow_enum#49 pending.
Something along the lines of marshmallow-code/marshmallow#1470 (comment) might be applicable, though haven't tried to make it work on this codebase much yet.