Products.zsqlmethods

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- Show rendered SQL output even if an exception occurred
(`15 <https://github.com/zopefoundation/Products.ZSQLMethods/issues/15>`_)

- Fix sqltest behavior with bytes inputs
(`14 <https://github.com/zopefoundation/Products.ZSQLMethods/issues/14>`_)

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- Compatibility fixes for better unicode support in DocumentTemplate.

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- Fix failing unpickling of older Z SQL Methods instances
(`12 <https://github.com/zopefoundation/Products.ZSQLMethods/issues/12>`_)

- Improve usability and add Zope 4 compatibility for connection forms.

- Improve general usability of the ZSQL Method edit and test forms.

- Enable the fancy editor for the ZSQL Method edit form.

- Sanitize ``tox`` and ``flake8`` configurations, reach ``flake8`` compliance.

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- Fix all ZMI forms for ZSQL Methods for Zope 4
(`11 <https://github.com/zopefoundation/Products.ZSQLMethods/issues/11>`_)

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- Specify supported Python versions using ``python_requires`` in setup.py
(`Zope481 <https://github.com/zopefoundation/Zope/issues/481>`_)

- Added support for Python 3.7 and 3.8.

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- Fix long-standing bug of setting an ``int`` as return value
for the transaction manager's ``sortKey`` method. It must be a string.

- PEP-8 compliance.

- Clean out all ``install_requires`` that are already required by ``Zope``.

- Only claim to support Python versions supported by Zope itself.