Zope.app.container

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- Nothing changed yet.

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- Drop support for Python 2.7, 3.4, 3.5, 3.6.

- Add support for Python 3.7, 3.8, 3.9, 3.10, 3.11.

- Fix deprecation warnings.

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- Added support for PyPy and Python 3.4, 3.5 and 3.6.

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- Replaced an undeclared test dependency on ``zope.app.authentication`` with
``zope.password``.

- Removed undeclared test dependency on ``zope.app.folder``.

- Replaced the use of ``zope.app.pagetemplate`` and deprecated
``zope.app.publisher`` with ``zope.browserpage`` and ``zope.browsermenu``.

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- Removed a testing dependency on ``zope.app.file``.

- Replaced a testing dependency on ``zope.app.securitypolicy`` with the base
``zope.securitypolicy`` distribution.

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- Updated ``ftesting.zcml`` to use the new permission names exported by
``zope.dublincore`` 3.7.