[manylinux2010] CPython 3.8.4 → 3.8.5 & 3.9.0b3 → 3.9.0b5
[manylinux2010] CPython 3.8.4 → 3.8.5 & 3.9.0b3 → 3.9.0b5

Changelogs:

* https://docs.python.org/release/3.8.5/whatsnew/changelog.html
* https://docs.python.org/3.9/whatsnew/changelog.html

manylinux/manylinux,pypa/manylinux,pypa/manylinux,manylinux/manylinux,pypa/manylinux