[Checkins] [zopefoundation/Products.ExternalMethod] 4618b7: Add missing dependencies.

[GitHub]

  Branch: refs/heads/py37
  Home:   https://github.com/zopefoundation/Products.ExternalMethod
  Commit: 4618b7fa2485f2e4553a8254963cae971b299a72
      https://github.com/zopefoundation/Products.ExternalMethod/commit/4618b7fa2485f2e4553a8254963cae971b299a72
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-10-11 (Thu, 11 Oct 2018)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Add missing dependencies.



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