[TODO] Complete dropping support for Python 3.8

[webknjaz]

#133 did this for CI already, but there are two pieces of the metadata that still advertise 3.8: Require-Python and Trove classifiers.

• https://github.com/python/cherry-picker/blob/e2540af/pyproject.toml#L13
• https://github.com/python/cherry-picker/blob/e2540af/pyproject.toml#L18

[hugovk]

Thanks, would you like to open a PR?

[webknjaz]

I think it's a good first issue so I'll let someone else do that.

[webknjaz]

@hugovk perhaps add the hacktoberfest labels to the issue and the repo?

[hugovk]

Sure! Issue labelled. I don't have permission to add topics to the repo, but can add hacktoberfest-accepted to a PR.

[webknjaz]

@hugovk ack. @OlenaYefymenko will make the PR soon.