[Checkins] [zopefoundation/zope.catalog] 28eae3: Set min version.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.catalog
  Commit: 28eae3476a69609270a5a25bb220a4b0469d2224
      https://github.com/zopefoundation/zope.catalog/commit/28eae3476a69609270a5a25bb220a4b0469d2224
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-01-23 (Tue, 23 Jan 2018)

  Changed paths:
    M setup.py

  Log Message:
  -----------
  Set min version.

This is required by the changes in #11.