Update sphinx to 3.0.4

[pyup-bot]

This PR updates Sphinx from 3.0.1 to 3.0.4.

Changelog

3.0.4

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

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

* 7567: autodoc: parametrized types are shown twice for generic types
* 7637: autodoc: system defined TypeVars are shown in Python 3.9
* 7696: html: Updated jQuery version from 3.4.1 to 3.5.1 for security reasons
* 7611: md5 fails when OpenSSL FIPS is enabled
* 7626: release package does not contain ``CODE_OF_CONDUCT``

3.0.3

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

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

* C, parse array declarators with static, qualifiers, and VLA specification.

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

* 7516: autodoc: crashes if target object raises an error on accessing
its attributes

3.0.2

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

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

* C, parse attributes and add :confval:`c_id_attributes`
and :confval:`c_paren_attributes` to support user-defined attributes.

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

* 7461: py domain: fails with IndexError for empty tuple in type annotation
* 7510: py domain: keyword-only arguments are documented as having a default of
None
* 7418: std domain: :rst:role:`term` role could not match case-insensitively
* 7461: autodoc: empty tuple in type annotation is not shown correctly
* 7479: autodoc: Sphinx builds has been slower since 3.0.0 on mocking
* C++, fix spacing issue in east-const declarations.
* 7414: LaTeX: Xindy language options were incorrect
* sphinx crashes with ImportError on python3.5.1

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 #70