Old default Python versions

I expected that e.g. python: '3.7' means 3.7.newest, so at the time of writing 3.7.9.

To my horror I discovered that

  1. Nope, it’s ancient 3.7.1, lacking quite some months of critical bugfixes
  2. There’s no documentation about what 3.x archives actually contain and if or how it’s possible to specify 3.x.newest

It would be great if there was a (documented) way to always use the newest patch version.