[RELEASE] Python 3.9.1 is now available, together with 3.10.0a3 and 3.8.7rc1

[Pablo Galindo Salgado]

It's starting to get very cold (at least on the Northern hemisphere) so we
have been carefully packaging a total of three new Python releases to keep
you warm these days!

Python 3.9.1 is the first maintenance release of Python 3.9, and also the
first version of Python to support macOS 11 Big Sur natively on Apple
Silicon. Go get it here:

https://www.python.org/downloads/release/python-391/

Maintenance releases for the 3.9 series will continue at regular bi-monthly
intervals, with **3.9.2** planned for Monday, 2021-02-08.

Python 3.10a3 is the third alpha release of Python 3.10. You can get it
here:

https://www.python.org/downloads/release/python-3100a3/

Python 3.10a3 is the release preview of the next maintenance release of
Python 3.8. You can get it here:

https://www.python.org/downloads/release/python-387rc1/

Assuming no critical problems are found prior to **2020-12-21** , the
currently scheduled release date for **3.8.7** , no code changes are
planned between this release candidate and the final release. That being
said, please keep in mind that this is a pre-release of 3.8.7 and as such
its main purpose is testing.

Your friendly release team,
Ned Deily, Steve Dower, Pablo Galindo, Łukasz Langa