Fix Python version specification

[adriangb]

Changes >=3.6.* to >=3.6.0 since >=3.6.* is not PEP 440 compliant.

Fixes #638.

[adriangb]

@piskvorky thank you for running CI.

I don't see how this change would cause CI failures, is it possible that CI is broken? It looks like the last commit to the trunk was several months ago, so I don't have a recent passing CI run to compare against.

[piskvorky]

@adriangb I don't know either; let's wait for @mpenkov 's review.

[mpenkov]

Not sure what the problem is here. Let me re-run all the test jobs to see if it was some sort of temporary issue.

[adriangb]

@mpenkov any input into the CI issues? It'd be nice to get this + a release out as soon as possible.

[mpenkov]

Yes, we're working on it in #633. I'll try to get this merged this week.

[mpenkov]

Closing in favor of #639.

@adriangb Thank you for your work! I'm going to merge a separate PR because it uses a slightly stricter (and in my opinion, better) check.

[adriangb]

Sounds good to me as long as it's fixed. I was just trying to make it as similar to the current check as possible.

[mpenkov]

OK. I'll try to do a release later today.