[Checkins] [zopefoundation/RestrictedPython] dda59b: Back to 5.4

[GitHub]

  Branch: refs/heads/remove_six
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: dda59baea1ddfc9f0bccd8b9e09ce7383a5dfefd
      https://github.com/zopefoundation/RestrictedPython/commit/dda59baea1ddfc9f0bccd8b9e09ce7383a5dfefd
  Author: Michael Howitz <mh at gocept.com>
  Date:   2017-02-01 (Wed, 01 Feb 2017)

  Changed paths:
    M .travis.yml

  Log Message:
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  Back to 5.4