[Checkins] [zopefoundation/Zope] dd0873: Update to current releases of the dependencies.

[Michael Howitz]

  Branch: refs/heads/current-versions
  Home:   https://github.com/zopefoundation/Zope
  Commit: dd087319f96f5cce9398a7161962526cb8ff6958
      https://github.com/zopefoundation/Zope/commit/dd087319f96f5cce9398a7161962526cb8ff6958
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-08-07 (Wed, 07 Aug 2019)

  Changed paths:
    M constraints.txt
    M requirements-full.txt
    M versions-prod.cfg
    M versions.cfg

  Log Message:
  -----------
  Update to current releases of the dependencies.