[Checkins] [zopefoundation/Zope] 4ccbda: - update to z3c.pt to fix #716

[Jens Vagelpohl]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Zope
  Commit: 4ccbdad08e9b2d1e4c015e74099d0245d14c8a35
      https://github.com/zopefoundation/Zope/commit/4ccbdad08e9b2d1e4c015e74099d0245d14c8a35
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2020-03-31 (Tue, 31 Mar 2020)

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

  Log Message:
  -----------
  - update to z3c.pt to fix #716