[Checkins] [zopefoundation/Zope] 3189d7: Pin Paste, too as it is used in zope.ini.

[Michael Howitz]

  Branch: refs/heads/fix-452
  Home:   https://github.com/zopefoundation/Zope
  Commit: 3189d76972df42031f755b7729b57e0ab532b15f
      https://github.com/zopefoundation/Zope/commit/3189d76972df42031f755b7729b57e0ab532b15f
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-06-17 (Mon, 17 Jun 2019)

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

  Log Message:
  -----------
  Pin Paste, too as it is used in zope.ini.

Fixes #452.