Import ABC from collections.abc instead of collections for Python 3 compatibility

[tirkarthi]

Fixes #10

[SpudInNZ]

This is now causing python-jose-cryptodome to not work with Python 3.10 - can somebody with write access please merge and release this PR?

[thomaskosciuch]

@markhu - would it be possible to merge?

[satu]

will this ever be merged and release? I bumped into this while using https://github.com/capless/warrant library.

[markhu]

This is not my repo, so I can't merge.

[Yamen-Malik]

Did anyone find a work around or an alternative?
I've fixed the problem manually for development but this won't work on production (too janky).

UPDATE:
I ended up using pyJWT module.

If anyone is going to do the same make sure to convert the RSA key from JWK (dictionary) to PEM format. To do that use the following line:
jwt.algorithms.RSAAlgorithm.from_jwk(json.dumps(rsa_key))