[Checkins] [zopefoundation/Zope] 39992f: Bump Python 3.8 on Travis to use the stable version.

[Joni Orponen]

  Branch: refs/heads/roto-bump-travis-py38-to-stable
  Home:   https://github.com/zopefoundation/Zope
  Commit: 39992f27879ce59405eba9355364a556dd6e2103
      https://github.com/zopefoundation/Zope/commit/39992f27879ce59405eba9355364a556dd6e2103
  Author: Joni Orponen <joni.orponen at rokki.ch>
  Date:   2019-10-23 (Wed, 23 Oct 2019)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Bump Python 3.8 on Travis to use the stable version.