Acquisition

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- Add support for building arm64 wheels on macOS.

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- Add support for final Python 3.11 release.

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- Add support for Python 3.11 (as of 3.11.0rc1).

- Switch from ``-Ofast`` to ``-O3`` when compiling code for Linux wheels.
(`64 <https://github.com/zopefoundation/Acquisition/pull/64>`_)

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- Fix bug in the ``PURE_PYTHON`` version affecting ``aq_acquire`` applied
to a class with a filter.

- Improve interface documentation.

- Add support for Python 3.10.

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- On CPython no longer omit compiling the C code when ``PURE_PYTHON`` is
required. Just evaluate it at runtime.
(`53 <https://github.com/zopefoundation/Acquisition/issues/53>`_)

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- Various fixes for the ``PURE_PYTHON`` version, e.g.
make ``Acquired`` an ``str`` (as required by ``Zope``),
avoid infinite ``__cmp__`` loop.
(`51 <https://github.com/zopefoundation/Acquisition/issues/51>`_,
`48 <https://github.com/zopefoundation/Acquisition/issues/48>`_)

- Create aarch64 wheels.