Bump sphinx from 1.7.4 to 1.8.4

[dependabot-preview]

Bumps sphinx from 1.7.4 to 1.8.4.

Changelog

Sourced from sphinx's changelog.

Release 1.8.4 (released Feb 03, 2019)

Bugs fixed

• #3707: latex: no bold checkmark (✔) available.
• #5605: with the documentation language set to Chinese, English words could not
  be searched.
• #5889: LaTeX: user numfig_format is stripped of spaces and may cause
  build failure
• C++, fix hyperlinks for declarations involving east cv-qualifiers.
• #5755: C++, fix duplicate declaration error on function templates with constraints
  in the return type.
• C++, parse unary right fold expressions and binary fold expressions.
• pycode could not handle egg files on windows
• #5928: KeyError: 'DOCUTILSCONFIG' when running build
• #5936: LaTeX: PDF build broken by inclusion of image taller than page height
  in an admonition
• #5231: "make html" does not read and build "po" files in "locale" dir
• #5954: :scale: image option may break PDF build if image in an admonition
• #5966: mathjax has not been loaded on incremental build
• #5960: LaTeX: modified PDF layout since September 2018 TeXLive update of
  :file:parskip.sty
• #5948: LaTeX: duplicated labels are generated for sections
• #5958: versionadded directive causes crash with Python 3.5.0
• #5995: autodoc: autodoc_mock_imports conflict with metaclass on Python 3.7
• #5871: texinfo: a section title . is not allowed

Release 1.8.3 (released Dec 26, 2018)

Features added

• LaTeX: it is possible to insert custom material to appear on back of title
  page, see discussion of 'maketitle' key of :confval:latex_elements
  ('manual' docclass only)

Bugs fixed

• #5725: mathjax: Use CDN URL for "latest" version by default
• #5460: html search does not work with some 3rd party themes
• #5520: LaTeX, caption package incompatibility since Sphinx 1.6
• #5614: autodoc: incremental build is broken when builtin modules are imported
• #5627: qthelp: index.html missing in QtHelp
• #5659: linkcheck: crashes for a hyperlink containing multibyte character
• #5754: DOC: Fix some mistakes in :doc:/latex
• #5810: LaTeX: sphinxVerbatim requires explicit "hllines" set-up since 1.6.6

... (truncated)

Commits

• 2f61ba8 Bump to 1.8.4 final
• 4c3ce03 Merge pull request #6006 from tk0miya/5948_duplicated_labels
• b7c6796 Fix #5948: LaTeX: duplicated labels are generated for sections
• ed3d13b Merge pull request #6009 from tk0miya/4611_add_testcase_for_html_style
• ba7b7b3 Merge pull request #6008 from tk0miya/4611_use_simple_svg
• a8777f6 Merge pull request #6007 from tk0miya/5871_fix_texinfo_period
• 97782c8 Separate testcase for html_style to single case from root
• 36e770f test: Replace SVG image by simple one
• 0bb5aa8 Update CHANGES for PR #5872
• e483e4a texinfo: remove DOTs from name if name contains other characters
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #100 into dev will not change coverage.
The diff coverage is n/a.

@@         Coverage Diff         @@
##            dev   #100   +/-   ##
===================================
  Coverage   100%   100%           
===================================
  Files        13     13           
  Lines       438    438           
===================================
  Hits        438    438

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[dependabot-preview]

Superseded by #117.