[Checkins] [zopefoundation/Acquisition] 898424: Add support for Python 3.8a3.

[Michael Howitz]

  Branch: refs/heads/py38
  Home:   https://github.com/zopefoundation/Acquisition
  Commit: 8984243b8c6c33b9dc135e9a2f33aab27a432c51
      https://github.com/zopefoundation/Acquisition/commit/8984243b8c6c33b9dc135e9a2f33aab27a432c51
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-04-05 (Fri, 05 Apr 2019)

  Changed paths:
    M .travis.yml
    M CHANGES.rst
    M setup.py
    M tox.ini

  Log Message:
  -----------
  Add support for Python 3.8a3.