importing ABCs 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and fails in 3.10

[feenes]

when trying to use minibelt with python 3.10 following error occurs:

:1: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.10 it will stop working
from collections import MutableSet