[Checkins] [zopefoundation/ExtensionClass] f93a57: Drop support for Python 3.4; add support for 3.8. ...

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/ExtensionClass
  Commit: f93a5754571b62e922a8fe40dfc0ae48389cbc33
      https://github.com/zopefoundation/ExtensionClass/commit/f93a5754571b62e922a8fe40dfc0ae48389cbc33
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

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

  Log Message:
  -----------
  Drop support for Python 3.4; add support for 3.8. (#23)

Refactor tox.ini.