Rebuild for PyPy3.8 and PyPy3.9

[regro-cf-autotick-bot]

This PR has been triggered in an effort to update pypy38.

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[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[twiecki]

@maresb I'm scared of pypy now is this safe to merge?

[maresb]

I'm not in any particular hurry to see this merged. We could sit on it for a while until a day where we feel particularly adventurous.

The current situation of having been stuck for so long on pypy37 was mainly due to conda-forge/scipy-feedstock#204 taking two months. Hopefully now BLAS will now have full proper support.

But then the only annoying thing about 3.7 was that BLAS wasn't loading properly. If someone's adventurous enough to try PyPy they're likely also capable of troubleshooting BLAS issues.

As for the recipe itself, I wrote it well so that it would be ready for this update! 😄

But now that pypy37 is officially gone, I can remove the corresponding selectors, simplifying the recipe...

[maresb]

Let's please close this in favor of #99.