Fix crash due to deprecation of collections in python 3.10

[contra-bit]

Description

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

This correctly imports from collections.abc

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[paulkerschner]

I tried your fix and it work for me. What would happen to people with version 3.9? Maby try both ways?

[goedel-gang]

I tried your fix and it work for me. What would happen to people with version 3.9? Maby try both ways?

@paulcool234, This change shouldn't cause any problems for people with a Python version of at least 3.3 (so it should certainly be fine for anyone that has an officially supported version of Python 3), since that's when all those things moved to collections.abc. It's just that until version 3.10, you could still import them from collections for backward compatibility, but you're officially supposed to import from collections.abc anyway. See the documentation from 3.3 already here: https://docs.python.org/3.3/library/collections.abc.html

[glutanimate]

Hey contra-bit, thanks for the PR! This should now be addressed in v1.0.0 (as part of other refactoring changes). Still, I do appreciate the contribution and apologize for getting to this so late.