Bump sphinx from 2.1.2 to 2.2.0

[dependabot-preview]

Bumps sphinx from 2.1.2 to 2.2.0.

Changelog

Sourced from sphinx's changelog.

Release 2.2.0 (released Aug 19, 2019)

Incompatible changes

• apidoc: template files are renamed to .rst_t
• html: Field lists will be styled by grid layout

Deprecated

• sphinx.domains.math.MathDomain.add_equation()
• sphinx.domains.math.MathDomain.get_next_equation_number()
• The info and warn arguments of
  sphinx.ext.autosummary.generate.generate_autosummary_docs()
• sphinx.ext.autosummary.generate._simple_info()
• sphinx.ext.autosummary.generate._simple_warn()
• sphinx.ext.todo.merge_info()
• sphinx.ext.todo.process_todo_nodes()
• sphinx.ext.todo.process_todos()
• sphinx.ext.todo.purge_todos()

Features added

• #5124: graphviz: :graphviz_dot: option is renamed to :layout:
• #1464: html: emit a warning if :confval:html_static_path and
  :confval:html_extra_path directories are inside output directory
• #6514: html: Add a label to search input for accessability purposes
• #5602: apidoc: Add --templatedir option
• #6475: Add override argument to app.add_autodocumenter()
• #6310: imgmath: let :confval:imgmath_use_preview work also with the SVG
  format for images rendering inline math
• #6533: LaTeX: refactor visit_enumerated_list() to use \sphinxsetlistlabels
• #6628: quickstart: Use https://docs.python.org/3/ for default setting of
  :confval:intersphinx_mapping
• #6419: sphinx-build: give reasons why rebuilded

Bugs fixed

• py domain: duplicated warning does not point the location of source code
• #6499: html: Sphinx never updates a copy of :confval:html_logo even if
  original file has changed
• #1125: html theme: scrollbar is hard to see on classic theme and macOS
• #5502: linkcheck: Consider HTTP 503 response as not an error
• #6439: Make generated download links reproducible
• #6486: UnboundLocalError is raised if broken extension installed
• #6567: autodoc: :confval:autodoc_inherit_docstrings does not effect to

... (truncated)

Commits

• bea7b5d Bump to 2.2.0 final
• 2e9f66b Update CHANGES for PR #6625
• 0df7ab0 Merge pull request #6625 from jakobandersen/6604_field_list_rendering
• 4ab751c Merge pull request #6657 from tk0miya/6605_crash_with_methodlikeobj
• 9dd7688 Fix field lists after switch to HTML5 writer
• 65e2fdc Fix #6605: autodoc: crashed when target code contains custom method-like objects
• 4a1df77 Update CHANGES for PR #6419
• a5d8e3d Merge pull request #6419 from larsoner/config
• 4e12d4b Merge pull request #6653 from jdufresne/importlib
• ecb1e76 Switch uses of import to importlib.get_module()
• Additional commits viewable in compare view

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