Drop support for Python 3.7

[smoser]

Fixes #2758

Thanks for contributing, make sure you address all the checklists (for details on how see development documentation)

• ran the linter to address style issues (tox -e fix)
• wrote descriptive pull request text
• ensured there are test(s) validating the fix
• added news fragment in docs/changelog folder
• updated/extended the documentation

[smoser]

It looks like I've broken check / test pypy-3.8 - windows-latest (pull_request) , suggestions on how to fix are more than welcome.

[gaborbernat]

Cannot happen for another 6 months.

[smoser]

Cannot happen for another 6 months.

Thanks for reviewing.
Just curious, is there a policy I can read somewhere?

[smoser]

Cannot happen for another 6 months.

Thanks for reviewing. Just curious, is there a policy I can read somewhere?

oh, i see you commented in the issue supported for 18 months past EOL. Thanks.