[Checkins] [zopefoundation/zc.lockfile] 1a1287: Add support for Python 3.8, drop support for 3.4.

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zc.lockfile
  Commit: 1a128707e5bc7b71067349b7ad6521159b24c0be
      https://github.com/zopefoundation/zc.lockfile/commit/1a128707e5bc7b71067349b7ad6521159b24c0be
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-08-08 (Thu, 08 Aug 2019)

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

  Log Message:
  -----------
  Add support for Python 3.8, drop support for 3.4.