[Checkins] [zopefoundation/zopetoolkit] 50ecbe: Allow to fail 3.8

[Michael Howitz]

  Branch: refs/heads/icemac-patch-1
  Home:   https://github.com/zopefoundation/zopetoolkit
  Commit: 50ecbee97f0febafcfe384e38e0975b78ae2b703
      https://github.com/zopefoundation/zopetoolkit/commit/50ecbee97f0febafcfe384e38e0975b78ae2b703
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-06-17 (Mon, 17 Jun 2019)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Allow to fail 3.8

There is a bug in the currently used Python version.