[Checkins] [zopefoundation/zExceptions] 994321: Update to PyPy 3.3

[GitHub]

  Branch: refs/heads/davisagli-exception-headers
  Home:   https://github.com/zopefoundation/zExceptions
  Commit: 9943213211268c3debed2fbc9f35baab69a59729
      https://github.com/zopefoundation/zExceptions/commit/9943213211268c3debed2fbc9f35baab69a59729
  Author: Michael Howitz <mh at gocept.com>
  Date:   2017-02-01 (Wed, 01 Feb 2017)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Update to PyPy 3.3