[Checkins] [zopefoundation/Acquisition] 2d1978: Try out Python 3.9 on TravisCI.

[Michael Howitz]

  Branch: refs/heads/py39
  Home:   https://github.com/zopefoundation/Acquisition
  Commit: 2d197878ea4eaba3b5eec39777f7a5432b6f3251
      https://github.com/zopefoundation/Acquisition/commit/2d197878ea4eaba3b5eec39777f7a5432b6f3251
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-09-28 (Mon, 28 Sep 2020)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Try out Python 3.9 on TravisCI.