[Checkins] [zopefoundation/Acquisition] 450b8b: Add support for Python 3.8 and 3.9.

[Michael Howitz]

  Branch: refs/heads/py39
  Home:   https://github.com/zopefoundation/Acquisition
  Commit: 450b8b5ee48eafa6c4ba6d26380c8438b63f9fb1
      https://github.com/zopefoundation/Acquisition/commit/450b8b5ee48eafa6c4ba6d26380c8438b63f9fb1
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-09-28 (Mon, 28 Sep 2020)

  Changed paths:
    M .gitignore
    M .travis.yml
    M CHANGES.rst
    M appveyor.yml
    R bootstrap.py
    M setup.py
    M tox.ini

  Log Message:
  -----------
  Add support for Python 3.8 and 3.9.