Bump sphinx from 2.1.1 to 2.1.2

[dependabot-preview[bot]]

Bumps sphinx from 2.1.1 to 2.1.2.

Changelog

*Sourced from [sphinx's changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES).* > Release 2.1.2 (released Jun 19, 2019) > ===================================== > > Bugs fixed > ---------- > > * [#6497](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6497): custom lexers fails highlighting when syntax error > * [#6478](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6478), [#6488](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6488): info field lists are incorrectly recognized

Commits

- [`39563d1`](https://github.com/sphinx-doc/sphinx/commit/39563d1b294ef5cce7102ad82177e99f646ba042) Bump to 2.1.2 final - [`131c93c`](https://github.com/sphinx-doc/sphinx/commit/131c93caf59a4737f31b6e187e17a3366c28109d) Remove "universal" configuration from setup.cfg - [`2709cd3`](https://github.com/sphinx-doc/sphinx/commit/2709cd3cd18394b0771de0539caaffabe8f7d502) Update CHANGES for PR [#6482](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6482) - [`982f63e`](https://github.com/sphinx-doc/sphinx/commit/982f63e4a22aee01cca73609dcaf13ac32eb60d2) Merge pull request [#6482](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6482) from ViktorHaag/object-descr-setting-class-type-map-... - [`e9ee39d`](https://github.com/sphinx-doc/sphinx/commit/e9ee39d655be2c1aff29aa3716f9f3dfbcd82006) repair white space - [`6a05435`](https://github.com/sphinx-doc/sphinx/commit/6a054355d92628fbfa4670f097b5ce20db6fdc2e) Simplify to ensure we're lazily setting the instance field-type-map variable - [`be08561`](https://github.com/sphinx-doc/sphinx/commit/be0856190fe076d6ea012f70cbb78fd040f7f986) Merge pull request [#6502](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6502) from tk0miya/6497_custom_lexers_fails_highlighting - [`2119a65`](https://github.com/sphinx-doc/sphinx/commit/2119a65b860ea6619efe0881118cc3c693558ac5) Fix [#6497](https://github-redirect.dependabot.com/sphinx-doc/sphinx/issues/6497): custom lexers fails highlighting when syntax error - [`d19dd1c`](https://github.com/sphinx-doc/sphinx/commit/d19dd1c8dec8cc80229e8314cdbc37650b366eaf) mypy type annotations for methods added - [`085ae2e`](https://github.com/sphinx-doc/sphinx/commit/085ae2e08187acc5dfdff7e79364e5962afc121c) type declaration for new internal method - Additional commits viewable in [compare view](https://github.com/sphinx-doc/sphinx/compare/v2.1.1...v2.1.2)

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[dependabot-preview[bot]]

Superseded by #42.