[Checkins] [zopefoundation/ExtensionClass] d4996e: Restore Python 2.7 and PyPy support.

[Michael Howitz]

  Branch: refs/heads/drop-py2
  Home:   https://github.com/zopefoundation/ExtensionClass
  Commit: d4996e877c85d4d0bd6f08f11fdf4faa5716c884
      https://github.com/zopefoundation/ExtensionClass/commit/d4996e877c85d4d0bd6f08f11fdf4faa5716c884
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-24 (Tue, 24 Mar 2020)

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

  Log Message:
  -----------
  Restore Python 2.7 and PyPy support.