[Checkins] [zopefoundation/zc.zodbrecipes] 43c990: Unify python version

[Michael Howitz]

  Branch: refs/heads/py3.5+
  Home:   https://github.com/zopefoundation/zc.zodbrecipes
  Commit: 43c990f5ea72cee5738a70bdf2a5e6def3927337
      https://github.com/zopefoundation/zc.zodbrecipes/commit/43c990f5ea72cee5738a70bdf2a5e6def3927337
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-02-12 (Wed, 12 Feb 2020)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Unify python version