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- Support attribute based setters like ``argparse.Namespace`` in ``set_``, ``set_with``, ``update``, and ``update_with``.
- Fix exception in ``order_by`` when ``None`` used as a sort key. Thanks elijose55_!
- Fix behavior of ``pick_by`` to return the passed in argument when only one argument given. Previously, an empty dictionary was returned. Thanks elijose55_!
- Officially support Python 3.8.