Update dependency eslint to v6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
eslint (source)	devDependencies	major	^5.9.0 -> ^6.0.0

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Release Notes

eslint/eslint

### [`v6.0.0`](https://togithub.com/eslint/eslint/releases/v6.0.0) [Compare Source](https://togithub.com/eslint/eslint/compare/v5.16.0...v6.0.0) - [`81aa06b`](https://togithub.com/eslint/eslint/commit/81aa06b4cc49e9c15234a2c4d27659a03fea53d8) Upgrade: espree@6.0.0 ([#​11869](https://togithub.com/eslint/eslint/issues/11869)) (Teddy Katz) - [`5f022bc`](https://togithub.com/eslint/eslint/commit/5f022bc91d0d93d140876ceb1ee4e08b1b7cfd49) Fix: no-else-return autofix produces name collisions (fixes [#​11069](https://togithub.com/eslint/eslint/issues/11069)) ([#​11867](https://togithub.com/eslint/eslint/issues/11867)) (Milos Djermanovic) - [`ded9548`](https://togithub.com/eslint/eslint/commit/ded9548d881b15e771ca79b844e8159601f30f70) Fix: multiline-comment-style incorrect message ([#​11864](https://togithub.com/eslint/eslint/issues/11864)) (golopot) - [`cad074d`](https://togithub.com/eslint/eslint/commit/cad074d4ddb34a59183b5965ca50170713b5a711) Docs: Add JSHint W047 compat to no-floating-decimal ([#​11861](https://togithub.com/eslint/eslint/issues/11861)) (Timo Tijhof) - [`41f6304`](https://togithub.com/eslint/eslint/commit/41f6304ce641a82ee729251b448dceb9fb0d501d) Upgrade: sinon ([#​11855](https://togithub.com/eslint/eslint/issues/11855)) (Toru Nagashima) - [`167ce87`](https://togithub.com/eslint/eslint/commit/167ce87e908ec04b0d3d79960278d45c883c4285) Chore: remove unuseable profile command ([#​11854](https://togithub.com/eslint/eslint/issues/11854)) (Toru Nagashima) - [`c844c6f`](https://togithub.com/eslint/eslint/commit/c844c6f2ff314cfa8c6ca0e35a1ef58b7e297b79) Fix: max-len properly ignore trailing comments (fixes [#​11838](https://togithub.com/eslint/eslint/issues/11838)) ([#​11841](https://togithub.com/eslint/eslint/issues/11841)) (ZYSzys) - [`1b5661a`](https://togithub.com/eslint/eslint/commit/1b5661ae467c227c0239e06cc1466480004aa799) Fix: no-var should not fix variables named 'let' (fixes [#​11830](https://togithub.com/eslint/eslint/issues/11830)) ([#​11832](https://togithub.com/eslint/eslint/issues/11832)) (Milos Djermanovic) - [`4d75956`](https://togithub.com/eslint/eslint/commit/4d75956147b6fd662ee90eb21d3f762816463b88) Build: CI with Azure Pipelines ([#​11845](https://togithub.com/eslint/eslint/issues/11845)) (Toru Nagashima) - [`1db3462`](https://togithub.com/eslint/eslint/commit/1db346220889305a427b45a00afcf362b81b3767) Chore: rm superfluous argument & fix perf-multifiles-targets ([#​11834](https://togithub.com/eslint/eslint/issues/11834)) (薛定谔的猫) - [`c57a4a4`](https://togithub.com/eslint/eslint/commit/c57a4a4a993193c4208c6419df331a7bc644a536) Upgrade: [@​babel/polyfill](https://togithub.com/babel/polyfill) => core-js v3 ([#​11833](https://togithub.com/eslint/eslint/issues/11833)) (薛定谔的猫) - [`65faa04`](https://togithub.com/eslint/eslint/commit/65faa04e8b42eecd4505111bbff296951179f033) Docs: Clarify prefer-destructuring array/object difference (fixes [#​9970](https://togithub.com/eslint/eslint/issues/9970)) ([#​11851](https://togithub.com/eslint/eslint/issues/11851)) (Oliver Sieweke) - [`81c3823`](https://togithub.com/eslint/eslint/commit/81c382378923a45015bafe58362f6c8faa5c3d5f) Fix: require-atomic-updates reports parameters (fixes [#​11723](https://togithub.com/eslint/eslint/issues/11723)) ([#​11774](https://togithub.com/eslint/eslint/issues/11774)) (Toru Nagashima) - [`aef8ea1`](https://togithub.com/eslint/eslint/commit/aef8ea1a44b9f13d468f48536c4c93f79f201d9b) Sponsors: Sync README with website (ESLint Jenkins)

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