[Checkins] [zopefoundation/zope.server] 586dfd: Modernize Python versions

[Jürgen Gmach]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.server
  Commit: 586dfd778c0cd21c1c31d09b89f431454e95e707
      https://github.com/zopefoundation/zope.server/commit/586dfd778c0cd21c1c31d09b89f431454e95e707
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2020-05-01 (Fri, 01 May 2020)

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

  Log Message:
  -----------
  Modernize Python versions

- add support for Python 3.8
- drop support for Python 3.4
- add `python_requires` to `setup.py`

modified:   .travis.yml
modified:   CHANGES.rst
modified:   setup.py
modified:   tox.ini
modified:   appveyor.yml