- Update to 9.0.0
* #252 via #339 and #510: Cheroot now requires Python 3.6 or
later. Python 3.5 and Python 2.7 are still supported by the
maint/8.x branch and stabilizing bugfixes will be accepted to
that branch -- by @jaraco
* Set worker thread names as str by @jarus in #503
* Added types for _compat.py by @kasium in #491
* Configured stubtest hook for stub testing by @kasium in #415
* Started running Python commands in tox in isolated and strict
mode by @webknjaz in #562