[Checkins] [zopefoundation/zope.container] 52279a: Add 3.8 wheels for mac os.

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.container
  Commit: 52279a609362d49c03613b64b922c3c5b147ba54
      https://github.com/zopefoundation/zope.container/commit/52279a609362d49c03613b64b922c3c5b147ba54
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-13 (Fri, 13 Mar 2020)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Add 3.8 wheels for mac os.