Add Python 3.10 and drop Django 3.1

[smithdc1]

Hey, hope all is well.

This PR adds Python 3.10 supprt and also drops support from Django 3.1 which is now EOL.

Following review and merge of this do you think we could issue a new release to confirm support of these new versions?

[codecov]

Codecov Report

Merging #198 (8e54c4e) into master (1923108) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #198   +/-   ##
=======================================
  Coverage   94.49%   94.49%           
=======================================
  Files          31       31           
  Lines        1363     1363           
=======================================
  Hits         1288     1288           
  Misses         75       75           

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[bittner]

Ooops, I'm sorry, looks like I overlooked this PR when you opened it more than 2 weeks ago! 😟

I'm working on rebasing #174 at this very moment. I might include your changes there, too. I hope that's fine for you.

And yes, I'm okay with issuing a new release afterwards, sure!

[bittner]

Python 3.10 is not supported by any Django version yet. See the meta data of, e.g., Django 4.0 alpha 1 on PyPI for reference.

Django 3.1 is still supported until the end of this year, according to the Django Project website.

Can we wait with your changes until January next year?

[smithdc1]

Ah yes. I got carried away a couple of weeks ago.

4.0b1 has been released today and supports 3.10. the next point release of 3.2. will be released next week (1st of each month right?) which will add 3.10 support.

https://pypi.org/project/Django/4.0b1/

Happy for you to roll it into your other PR.

[smithdc1]

A short update as time has moved on. 3.2.9 and 4.0b1 are both released and support Python 3.10
https://pypi.org/project/Django/3.2.9/
https://pypi.org/project/Django/4.0b1/