Prettyprinter

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No breaking changes.

* Added pretty printer definition for ``types.MappingProxyType`` thanks to GitHub user `Cologler <https://github.com/Cologler/>`_
* Added support for ``_repr_pretty_`` in the extra ``ipython_repr_pretty``.

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* Fixed issue 7 where having a ``str`` value for IPython's ``highlighting_style`` setting was not properly handled in ``prettyprinter``'s IPython integration, and raised an exception when trying to print data.

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Breaking changes:

* by default, ``dict`` keys are printed in the default order (insertion order in CPython 3.6+). Previously they were sorted like in the ``pprint`` standard library module. To let the user control this, an additional keyword argument ``sort_dict_keys`` was added to ``cpprint``, ``pprint``, and ``pformat``. Pretty printer definitions can control ``dict`` key sorting with the ``PrettyContext`` instance passed to each pretty printer function.

Non-breaking changes:

* Improved performance of rendering colorized output by caching colors.
* Added ``prettyprinter.pretty_repr`` that is assignable to ``__repr__`` dunder methods, so you don't need to write it separately from the pretty printer definition.
* Deprecated use of ``PrettyContext.set`` in favor of less misleading ``PrettyContext.assoc``
* Defined pretty printing for instances of ``type``, i.e. classes.
* Defined pretty printing for functions

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Breaking change: instances of lists, sets, frozensets, tuples and dicts will be truncated to 1000 elements by default when printing.

* Added pretty printing definitions for ``dataclasses``
* Improved performance of splitting strings to multiple lines by ~15%
* Added a maximum sequence length that applies to subclasses of lists, sets, frozensets, tuples and dicts. The default is 1000. There is a trailing comment that indicates the number of truncated elements. To remove truncation, you can set ``max_seq_len`` to ``None`` using ``set_default_config`` explained below.
* Added ability to change the default global configuration using ``set_default_config``. The functions accepts zero to many keyword arguments and replaces those values in the global configuration with the ones provided.

.. code:: python

from prettyprinter import set_default_config

set_default_config(
style='dark',
max_seq_len=1000,
width=79,
ribbon_width=71,
depth=None,
)

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No backwards incompatible changes.

* Added pretty printer definitions for the ``requests`` library. To use it, include ``'requests'`` in your ``install_extras`` call: ``prettyprinter.install_extras(include=['requests'])``.

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No backwards incompatible changes.

* Added integration for the default Python shell
* Wrote docs to explain integration with the default Python shell
* Check ``install_extras`` arguments for unknown extras