[zope] Zope 5.12 released

On behalf of Zope developer community I am pleased to announce the release of Zope 5.12. This is mostly a bugfix release with one small feature addition, a History tab for Zope File objects that have text content and are editable in the ZMI. For details of the changes see https://zope.readthedocs.io/en/latest/changes.html To install the new version see https://zope.readthedocs.io/en/latest/INSTALL.html Jens Vagelpohl