Bump sphinx from 1.7.4 to 1.8.3

[dependabot-preview]

Bumps sphinx from 1.7.4 to 1.8.3.

Changelog

Sourced from sphinx's changelog.

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
  (refs: #1238)
• #5636: C++, fix parsing of floating point literals.
• #5496 (again): C++, fix assertion in partial builds with duplicates.
• #5724: quickstart: sphinx-quickstart fails when $LC_ALL is empty
• #1956: Default conf.py is not PEP8-compliant
• #5849: LaTeX: document class \maketitle is overwritten with no
  possibility to use original meaning in place of Sphinx custom one
• #5834: apidoc: wrong help for --tocfile
• #5800: todo: crashed if todo is defined in TextElement
• #5846: htmlhelp: convert hex escaping to decimal escaping in .hhc/.hhk files
• htmlhelp: broken .hhk file generated when title contains a double quote

Release 1.8.2 (released Nov 11, 2018)

Incompatible changes

• #5497: Do not include MathJax.js and jsmath.js unless it is really needed

Features added

• #5471: Show appropriate deprecation warnings

Bugs fixed

• #5490: latex: enumerated list causes a crash with recommonmark

... (truncated)

Commits

• 81328ca Bump to 1.8.3 final
• f8c6c14 Merge pull request #5862 from tk0miya/refactor_chm_htmlescape
• 6ffe549 refactor chm_htmlescape()
• 3f92aa7 Remove from CHANGES mention of non-existing 1.7.10 release
• 503cf9c Merge pull request #5860 from animalize/fix_test
• 9052471 don't generate build files inside /tests/roots/
• cedd94c [1.8] htmlhelp: convert hex escaping to decimal escaping in .hhc/.hhk files (...
• a77f344 Merge pull request #5850 from jfbu/latex_sphinxmaketitle
• 35d0934 Merge pull request #5848 from tk0miya/5800_todo_inside_TextElement
• 0034664 Update date and version of LaTeX class files
• Additional commits viewable in compare view

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[codecov]

Codecov Report

Merging #92 into dev will not change coverage.
The diff coverage is n/a.

@@         Coverage Diff         @@
##            dev    #92   +/-   ##
===================================
  Coverage   100%   100%           
===================================
  Files        13     13           
  Lines       438    438           
===================================
  Hits        438    438

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[dependabot-preview]

Superseded by #100.