[Checkins] [zopefoundation/zope.interface] f22a13: Make the RO for InterfaceClass consistent and fix ...

[Jason Madden]

  Branch: refs/heads/issue192-issue194
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: f22a136f072f0b4ec510f5ed7ae997d447f5199e
      https://github.com/zopefoundation/zope.interface/commit/f22a136f072f0b4ec510f5ed7ae997d447f5199e
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2020-03-20 (Fri, 20 Mar 2020)

  Changed paths:
    M .travis.yml
    M CHANGES.rst
    M src/zope/interface/interface.py
    M src/zope/interface/ro.py
    M src/zope/interface/tests/test_interfaces.py
    M src/zope/interface/tests/test_ro.py
    M tox.ini

  Log Message:
  -----------
  Make the RO for InterfaceClass consistent and fix handling of the STRICT_IRO env variable.

Fixes #192 and fixes #194.