Bump sphinx from 1.8.1 to 1.8.5

[dependabot-preview]

Bumps sphinx from 1.8.1 to 1.8.5.

Changelog

Sourced from sphinx's changelog.

Release 1.8.5 (released Mar 10, 2019)

Bugs fixed

• LaTeX: Remove extraneous space after author names on PDF title page (refs: #6004)
• #6026: LaTeX: A cross reference to definition list does not work
• #6046: LaTeX: TypeError is raised when invalid latex_elements given
• #6067: LaTeX: images having a target are concatenated to next line
• #6067: LaTeX: images having a target are not aligned even if specified
• #6149: LaTeX: :index: role in titles causes Use of \[@​icentercr](https://github.com/icentercr) doesn't match its definition error on latexpdf build
• #6019: imgconverter: Including multipage PDF fails
• #6047: autodoc: autofunction emits a warning for method objects
• #6028: graphviz: Ensure the graphviz filenames are reproducible
• #6068: doctest: skipif option may remove the code block from documentation
• #6136: :name: option for math directive causes a crash
• #6139: intersphinx: ValueError on failure reporting
• #6135: changes: Fix UnboundLocalError when any module found
• #3859: manpage: code-block captions are not displayed correctly

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

... (truncated)

Commits

• 591bdd7 Bump to 1.8.5 final
• f44aa23 Merge pull request #6159 from tk0miya/3859_code-block_captions_for_manpage
• fc99687 Fix #3859: manpage: code-block captions are not displayed correctly
• f57041a Merge pull request #6152 from tk0miya/6149_index_on_title
• 05d3e37 Fix #6149: LaTeX: :index: role titles causes build error of LaTeX
• 9f283bc Merge pull request #6153 from tk0miya/use_bionic_on_circleci
• f61a5f9 Fix test: imgconverter expects size of images fixed
• f7315ed Use bionic (py36) on Circle CI
• f03c2d4 Update CHANGES for PR #6135
• 7c50f8f Merge pull request #6135 from bz2/changes_module_1.8
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #101.