[Checkins] [zopefoundation/zope.interface] 3fa74f: Update .travis.yml

[Michael Howitz]

  Branch: refs/heads/roto-terryfy
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: 3fa74f7c363ca6d85191f2b6b4dabd5963d360de
      https://github.com/zopefoundation/zope.interface/commit/3fa74f7c363ca6d85191f2b6b4dabd5963d360de
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-02-08 (Fri, 08 Feb 2019)

  Changed paths:
    M .travis.yml

  Log Message:
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  Update .travis.yml