[Checkins] [zopefoundation/zopetoolkit] adb275: Update to current zope.hookable version

[GitHub]

  Branch: refs/heads/icemac-patch-1
  Home:   https://github.com/zopefoundation/zopetoolkit
  Commit: adb275a19f6d112d034013e5eaa028bc1fd9b892
      https://github.com/zopefoundation/zopetoolkit/commit/adb275a19f6d112d034013e5eaa028bc1fd9b892
  Author: Michael Howitz <mh at gocept.com>
  Date:   2017-07-27 (Thu, 27 Jul 2017)

  Changed paths:
    M ztk-versions.cfg

  Log Message:
  -----------
  Update to current zope.hookable version