[Checkins] [zopefoundation/grokcore.json] da67d5: update changelog

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/grokcore.json
  Commit: da67d59bdf40a92da08a4ce1cf6b4d837c7d8c88
      https://github.com/zopefoundation/grokcore.json/commit/da67d59bdf40a92da08a4ce1cf6b4d837c7d8c88
  Author: Jan-Wijbrand Kolman <jkolman at minddistrict.com>
  Date:   2018-01-12 (Fri, 12 Jan 2018)

  Changed paths:
    M CHANGES.txt

  Log Message:
  -----------
  update changelog