Zope.annotation

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- Nothing changed yet.

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- Add support for Python 3.11.

- Drop support for Python 2.7, 3.5, 3.6.

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- Add support for Python 3.8, 3.9, 3.10.

- Drop support for Python 3.4.

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- Add support for Python 3.7 and drop support for Python 3.3.

- Fix a DeprecationWarning from ``zope.annotation.attribute``. See
`issue 16 <https://github.com/zopefoundation/zope.annotation/issues/16>`_.

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- Make ``AttributeAnnotations`` have a ``__parent__``. The
``__parent__`` is the object that it stores ``__annotations__`` on.
This is a convenience for upwards traversal as used by things like
``zope.keyreference``. See
https://github.com/zopefoundation/zope.annotation/issues/11

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- Drop support for Python 2.6.

- Claim support for Python 3.5 and 3.6.

- Reach 100% test coverage.

- ``AttributeAnnotations`` is now always a
``collections.MutableMapping``. Previously on Python 2 it was a
``UserDict.DictMixin``.