[Checkins] [zopefoundation/zope.interface] e93507: Ensure Interface is the last item in the __sro__.

[Jason Madden]

  Branch: refs/heads/issue8
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: e93507bf479a9b3ec17bdb8f7f47f0333cfd5063
      https://github.com/zopefoundation/zope.interface/commit/e93507bf479a9b3ec17bdb8f7f47f0333cfd5063
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2020-03-16 (Mon, 16 Mar 2020)

  Changed paths:
    M CHANGES.rst
    M docs/README.rst
    M src/zope/interface/common/tests/__init__.py
    M src/zope/interface/declarations.py
    M src/zope/interface/interface.py
    M src/zope/interface/tests/test_interface.py

  Log Message:
  -----------
  Ensure Interface is the last item in the __sro__.

None of the elegant solutions mentioned in the issue worked out, so I had to brute force it.

Fixes #8