Scheduled biweekly dependency update for week 18

[pyup-bot]

Update Sphinx from 3.0.2 to 3.0.3.

Changelog

3.0.3

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

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

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

Deprecated
----------

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

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

Testing
--------

Links

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

[codecov]

Codecov Report

Merging #785 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #785   +/-   ##
=======================================
  Coverage   97.32%   97.32%           
=======================================
  Files          56       56           
  Lines        2920     2920           
=======================================
  Hits         2842     2842           
  Misses         78       78           

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