Update sphinx to 3.2.1

[pyup-bot]

This PR updates Sphinx from 3.2.0 to 3.2.1.

Changelog

3.2.1

=====================================

Features added
--------------

* 8095: napoleon: Add :confval:`napoleon_preprocess_types` to enable the type
preprocessor for numpy style docstrings
* 8114: C and C++, parse function attributes after parameters and qualifiers.

Bugs fixed
----------

* 8074: napoleon: Crashes during processing C-ext module
* 8088: napoleon: "Inline literal start-string without end-string" warning in
Numpy style Parameters section
* 8084: autodoc: KeyError is raised on documenting an attribute of the broken
class
* 8091: autodoc: AttributeError is raised on documenting an attribute on Python
3.5.2
* 8099: autodoc: NameError is raised when target code uses ``TYPE_CHECKING``
* C++, fix parsing of template template paramters, broken by the fix of 7944

Links

• PyPI: https://pypi.org/project/sphinx
• Changelog: https://pyup.io/changelogs/sphinx/
• Homepage: http://sphinx-doc.org/

[pyup-bot]

Closing this in favor of #273