Implement PEP 600

[xmunoz]

Finish the "perennial" manylinux PEP and get it approved and implemented to reduce the churn of hardcoded, brittle manylinux standards and react better to ongoing platform change.

[di]

The PEP has been approved and there is an in-progress rollout issue here: pypa/manylinux#542

[xmunoz]

Thanks for that. From the linked issue, it looks like most of the implementation work is done, so maybe this isn't a great candidate for funding.

[xmunoz]

#39 done