[Pkg-mailman-hackers] Bug#1013500: django-mailman3: FTBFS: TypeError: __init__() got an unexpected keyword argument 'providing_args'

[Charlemagne Lasse]

Control: tags -1 + fixed-upstream patch

This problem currently blocks various mailman3 related packages from
migrating to Debian bookwoom.

But it seems like this is fixed by 1.3.8:
https://pypi.org/project/django-mailman3/

(btw. thanks for the mailman 3.3.7 upload)