[Checkins] [zopefoundation/Products.ZCatalog] adc99a: Use more version pins.

[Michael Howitz]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/Products.ZCatalog
  Commit: adc99ac6c3db510b8b275c73573811ac45d9e1b4
      https://github.com/zopefoundation/Products.ZCatalog/commit/adc99ac6c3db510b8b275c73573811ac45d9e1b4
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M buildout.cfg

  Log Message:
  -----------
  Use more version pins.