chore(deps): 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

Compare Source

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

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