Pydash

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- Drop support for Python 2.7. (**breaking change**)
- Improve Unicode word splitting in string functions to be inline with Lodash. Thanks mervynlee94_! (**breaking change**)

- ``camel_case``
- ``human_case``
- ``kebab_case``
- ``lower_case``
- ``pascal_case``
- ``separator_case``
- ``slugify``
- ``snake_case``
- ``start_case``
- ``upper_case``

- Optimize regular expression constants used in ``pydash.strings`` by pre-compiling them to regular expression pattern objects.

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- Fix regression introduced in ``v4.8.0`` that caused ``merge`` and ``merge_with`` to raise an exception when passing ``None`` as the first argument.

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- Fix regression introduced in ``v4.9.1`` that broke ``pydash.get`` for dictionaries and dot-delimited keys that reference integer dict-keys.

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- Fix bug in ``get/has`` that caused ``defaultdict`` objects to get populated on key access.

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- Add ``default_to_any``. Thanks gonzalonaveira_!
- Fix mishandling of key names containing ``\.`` in ``set_``, ``set_with``, and ``update_with`` where the ``.`` was not treated as a literal value within the key name. Thanks zhaowb_!

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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.