Update sphinx to 2.2.2

[pyup-bot]

This PR updates Sphinx from 2.2.0 to 2.2.2.

Changelog

2.2.2

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

Dependencies
------------

Incompatible changes
--------------------

Deprecated
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Features added
--------------

Bugs fixed
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* 6776: LaTeX: 2019-10-01 LaTeX release breaks :file:`sphinxcyrillic.sty`

Testing
--------

2.2.1

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

Bugs fixed
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* 6641: LaTeX: Undefined control sequence ``\sphinxmaketitle``
* 6710: LaTeX not well configured for Greek language as main language
* 6759: validation of html static paths and extra paths no longer throws
an error if the paths are in different directories

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 #145