Our current Python version (3.7) is past end-of-life as of June 27 this year. As such, we should bump our minimum version to Python 3.8.

The new features are a nice bonus, too.

Our current Python version (3.7) is past end-of-life as of June 27 this year. As such (...)

As such, and because the only major downstream Linux distros left on 3.7 are Ubuntu 18.04 and Debian 10 (and they do support it, python.org EOL is merely one indicator). Ubuntu 18.04 doesn't receive new updates for Firefox, and by the time of the next ESR, Debian 10 will be EOL. So, yes, we can upgrade to 3.8. Then we may have to stick to 3.8 until April 2025, when Ubuntu 20.04 EOLs.

• If this is not done, the next person to vendor will also make all of
  the changes in this commit, which is unnecessary noise.