[Checkins] [zopefoundation/tempstorage] 4a1bc6: Fix broken PyPy build.

[Jürgen Gmach]

  Branch: refs/heads/revise-python-versions
  Home:   https://github.com/zopefoundation/tempstorage
  Commit: 4a1bc618e822e2bf8a0d681f9468b17f6881204f
      https://github.com/zopefoundation/tempstorage/commit/4a1bc618e822e2bf8a0d681f9468b17f6881204f
  Author: Jürgen Gmach <juergen.gmach at apis.de>
  Date:   2019-04-09 (Tue, 09 Apr 2019)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Fix broken PyPy build.

... by installing an updated setuptools version.

modified:   .travis.yml