Bump sphinx from 2.0.1 to 2.1.0

[dependabot-preview]

Bumps sphinx from 2.0.1 to 2.1.0.

Changelog

Sourced from sphinx's changelog.

Release 2.1.0 (released Jun 02, 2019)

Incompatible changes

• Ignore filenames without file extension given to Builder.build_specific()
  API directly
• #6230: The anchor of term in glossary directive is changed if it is consisted
  by non-ASCII characters
• #4550: html: Centering tables by default using CSS
• #6239: latex: xelatex and xeCJK are used for Chinese documents by default
• Sphinx.add_lexer() now takes a Lexer class instead of instance. An
  instance of lexers are still supported until Sphinx-3.x.

Deprecated

• sphinx.builders.latex.LaTeXBuilder.apply_transforms()
• sphinx.builders._epub_base.EpubBuilder.esc()
• sphinx.directives.Acks
• sphinx.directives.Author
• sphinx.directives.Centered
• sphinx.directives.Class
• sphinx.directives.CodeBlock
• sphinx.directives.Figure
• sphinx.directives.HList
• sphinx.directives.Highlight
• sphinx.directives.Include
• sphinx.directives.Index
• sphinx.directives.LiteralInclude
• sphinx.directives.Meta
• sphinx.directives.Only
• sphinx.directives.SeeAlso
• sphinx.directives.TabularColumns
• sphinx.directives.TocTree
• sphinx.directives.VersionChange
• sphinx.domains.python.PyClassmember
• sphinx.domains.python.PyModulelevel
• sphinx.domains.std.StandardDomain._resolve_citation_xref()
• sphinx.domains.std.StandardDomain.note_citations()
• sphinx.domains.std.StandardDomain.note_citation_refs()
• sphinx.domains.std.StandardDomain.note_labels()
• sphinx.environment.NoUri
• sphinx.ext.apidoc.format_directive()
• sphinx.ext.apidoc.format_heading()
• sphinx.ext.apidoc.makename()
• sphinx.ext.autodoc.importer.MockFinder
• sphinx.ext.autodoc.importer.MockLoader
• sphinx.ext.autodoc.importer.mock()

... (truncated)

Commits

• 653b0e0 Bump to 2.1.0 final
• 290ead8 Merge changes entry for 2.0.2 to 2.1.0
• 84da50c Merge pull request #6428 from tk0miya/improve_docs
• 1303ea7 docs: Use directive:option in extensions/graphviz
• 27dd836 Merge pull request #6423 from tk0miya/1063_autodoc_undoc_module_variables
• 91fceb4 Merge branch '2.0.2' into 2.0
• 69d93c9 Fix #1063: autodoc: automodule directive handles undocumented module level va...
• 54d5fcf Merge pull request #6416 from tk0miya/2310_force_highlighting
• 7184226 Sphinx.add_lexer() now takes a Lexer class instead of instance
• 5d8c25b refactor: app.add_lexer()
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 100.0% when pulling b93eabe on dependabot/pip/sphinx-2.1.0 into 339055d on master.

[dependabot-preview]

Superseded by #140.