Update sphinx to 2.2.2

[pyup-bot]

This PR updates Sphinx from 2.2.1 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
--------

Links

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

[codecov]

Codecov Report

Merging #1117 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #1117   +/-   ##
======================================
  Coverage     100%    100%           
======================================
  Files          13      13           
  Lines         620     620           
  Branches       13      13           
======================================
  Hits          620     620

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