Bump @typescript-eslint/parser from 2.11.0 to 2.12.0

[dependabot-preview[bot]]

Bumps @typescript-eslint/parser from 2.11.0 to 2.12.0.

Release notes

*Sourced from [@typescript-eslint/parser's releases](https://github.com/typescript-eslint/typescript-eslint/releases).* > ## v2.12.0 > # [2.12.0](https://github.com/typescript-eslint/typescript-eslint/compare/v2.11.0...v2.12.0) (2019-12-16) > > > ### Bug Fixes > > * **eslint-plugin:** [prefer-null-coal] fixer w/ mixed logicals ([#1326](https://github-redirect.dependabot.com/typescript-eslint/typescript-eslint/issues/1326)) ([f9a9fbf](https://github.com/typescript-eslint/typescript-eslint/commit/f9a9fbf)) > * **eslint-plugin:** [quotes] ignore backticks for interface properties ([#1311](https://github-redirect.dependabot.com/typescript-eslint/typescript-eslint/issues/1311)) ([3923a09](https://github.com/typescript-eslint/typescript-eslint/commit/3923a09)) > > > ### Features > > * **eslint-plugin:** [no-unnec-cond] check optional chaining ([#1315](https://github-redirect.dependabot.com/typescript-eslint/typescript-eslint/issues/1315)) ([a2a8a0a](https://github.com/typescript-eslint/typescript-eslint/commit/a2a8a0a))

Changelog

*Sourced from [@typescript-eslint/parser's changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/parser/CHANGELOG.md).* > # [2.12.0](https://github.com/typescript-eslint/typescript-eslint/compare/v2.11.0...v2.12.0) (2019-12-16) > > **Note:** Version bump only for package @typescript-eslint/parser

Commits

- [`6b7b88b`](https://github.com/typescript-eslint/typescript-eslint/commit/6b7b88b628664309a8672d286614879dce479b4b) chore: publish v2.12.0 - [`348d2f6`](https://github.com/typescript-eslint/typescript-eslint/commit/348d2f6b207acb9e18721cba53f0aa85908fa777) chore(parser): mark TS as optional peer dependency ([#1327](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser/issues/1327)) - See full diff in [compare view](https://github.com/typescript-eslint/typescript-eslint/commits/v2.12.0/packages/parser)

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[github-actions[bot]]

:umbrella: The latest upstream change (presumably these) made this pull request unmergeable. Please resolve the merge conflicts.