[Checkins] [zopefoundation/Acquisition] 417c40: Add support for Python 3.8a3.

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Acquisition
  Commit: 417c40bf1b723128fc62159212a9cbad8770668b
      https://github.com/zopefoundation/Acquisition/commit/417c40bf1b723128fc62159212a9cbad8770668b
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-04-06 (Sat, 06 Apr 2019)

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

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