Update dependency eslint to v7.9.0

This MR contains the following updates:

Package	Type	Update	Change
eslint (source)	devDependencies	minor	7.8.1 -> 7.9.0

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Release Notes

eslint/eslint

v7.9.0

Compare Source

• 3ca2700 Fix: Corrected notice for invalid (:) plugin names (#​13473) (Josh Goldberg)
• fc5783d Docs: Fix leaky anchors in v4 migration page (#​13635) (Timo Tijhof)
• f1d07f1 Docs: Provide install commands for Yarn (#​13661) (Nikita Baksalyar)
• 29d1cdc Fix: prefer-destructuring removes comments (refs #​13678) (#​13682) (Milos Djermanovic)
• b4da0a7 Docs: fix typo in working with plugins docs (#​13683) (啸生)
• 6f87db7 Update: fix id-length false negatives on Object.prototype property names (#​13670) (Milos Djermanovic)
• 361ac4d Fix: NonOctalDecimalIntegerLiteral is decimal integer (fixes #​13588) (#​13664) (Milos Djermanovic)
• f260716 Docs: update outdated link (#​13677) (klkhan)
• 5138c91 Docs: add missing eslint directive comments in no-await-in-loop (#​13673) (Milos Djermanovic)
• 17b58b5 Docs: clarify correct example in no-return-await (fixes #​13656) (#​13657) (Milos Djermanovic)
• 9171f0a Chore: fix typo (#​13660) (Nitin Kumar)
• 6d9f8fb Sponsors: Sync README with website (ESLint Jenkins)
• 97b0dd9 Sponsors: Sync README with website (ESLint Jenkins)
• deab125 Sponsors: Sync README with website (ESLint Jenkins)
• bf2e367 Sponsors: Sync README with website (ESLint Jenkins)
• 8929208 Sponsors: Sync README with website (ESLint Jenkins)

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