[Checkins] [zopefoundation/ZopeUndo] 4486db: Use Python 3.8 final on Travis CI

[Marius Gedminas]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/ZopeUndo
  Commit: 4486db3047d899ce1ec1f75757d73d984ca84c64
      https://github.com/zopefoundation/ZopeUndo/commit/4486db3047d899ce1ec1f75757d73d984ca84c64
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2019-10-23 (Wed, 23 Oct 2019)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Use Python 3.8 final on Travis CI