[Checkins] [zopefoundation/RestrictedPython] 096302: Require Python 2 compatible pytest-html version.

[Michael Howitz]

  Branch: refs/heads/icemac-patch-1
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: 09630206c522df183daea7cc54040abcd1a1b1a3
      https://github.com/zopefoundation/RestrictedPython/commit/09630206c522df183daea7cc54040abcd1a1b1a3
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-10-11 (Fri, 11 Oct 2019)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Require Python 2 compatible pytest-html version.

This should fix the AppVeyor tests.
TravisCI does not seem to show these problem because it caches the old version.