[Checkins] [zopefoundation/zopetoolkit] 3e000e: Update to newest versions + Test Python 3.8. (#38)

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zopetoolkit
  Commit: 3e000ef58a5c18cd8fff0ae0a58f7e35ffc5e2f1
      https://github.com/zopefoundation/zopetoolkit/commit/3e000ef58a5c18cd8fff0ae0a58f7e35ffc5e2f1
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-02-14 (Fri, 14 Feb 2020)

  Changed paths:
    M .travis.yml
    M README.rst
    M ztk-versions.cfg

  Log Message:
  -----------
  Update to newest versions + Test Python 3.8. (#38)