==================
- Add support for Python 3.6 and PyPy.
- Test with both ZODB/ZEO 4 and ZODB/ZEO 5.
Note that ServerZlibStorage cannot be used in a ZODB 5 Connection
(e.g., client-side, which wouldn't make sense :-]).
(https://github.com/zopefoundation/zc.zlibstorage/issues/5).
- Close the underlying iterator used by the ``iterator`` wrapper when
it is closed. (https://github.com/zopefoundation/zc.zlibstorage/issues/4)