Drop Python 3.6 support since 1.5.2

[bobleckelibm]

Per comments in #337 (comment) Python 3.6 has been EOL for a long time now — it would make sense to remove official support for it in this package, especially since v1.5.2 where code was introduced that was no longer 3.6 compatible.

Suggested change:
https://github.com/latchset/jwcrypto/blob/main/setup.py#L43

I suggest you go to 3.8 since that still has security support until later this year so why make it too restrictive. But wouldn't be mad if it just bumped to 3.9 or straight to 3.11

[bobleckelibm]

I would appreciate if the 1.5.2 on PyPi was yanked and re-released so that 3.6 installs don't pull in the problematic code. But I understand if that is not possible

[simo5]

The only thing I can do is to make a 1.5.3 release, which is cheap, so I guess I'll just do that..

[bobleckelibm]

Thanks for the amazingly fast response. Given the release went out, the effects aren't all that useful for us unless 1.5.2 is removed because we'll still get it when we try to upgrade jwcrpyto in a 3.6 env. I'm wondering if that's at all possible to do? We're going ahead and pinning for 3.6 anyhow, just want to check

[simo5]

Yanked 1.5.2 from pypi

[bobleckelibm]

Super thanks again