[Checkins] [zopefoundation/ZConfig] e46cc4: add python3.9 support

[Fred Drake]

  Branch: refs/heads/python39
  Home:   https://github.com/zopefoundation/ZConfig
  Commit: e46cc4d68749c38eeda8b9d64e4495b72027f2d0
      https://github.com/zopefoundation/ZConfig/commit/e46cc4d68749c38eeda8b9d64e4495b72027f2d0
  Author: Fred Drake <fred.drake at keepertech.com>
  Date:   2020-03-26 (Thu, 26 Mar 2020)

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

  Log Message:
  -----------
  add python3.9 support