[Checkins] [zopefoundation/z3c.relationfield] d39e0c: Test on Pyhon 3.7 and 3.8 as well (next to 2.7, 3....

[Maurits van Rees]

  Branch: refs/heads/maurits/check-python-versions
  Home:   https://github.com/zopefoundation/z3c.relationfield
  Commit: d39e0cc7960bf4af9375a9beb239d6990e46bff9
      https://github.com/zopefoundation/z3c.relationfield/commit/d39e0cc7960bf4af9375a9beb239d6990e46bff9
  Author: Maurits van Rees <maurits at vanrees.org>
  Date:   2020-04-17 (Fri, 17 Apr 2020)

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

  Log Message:
  -----------
  Test on Pyhon 3.7 and 3.8 as well (next to 2.7, 3.5, 3.6).