Update dependency @wordpress/eslint-plugin to v20

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@wordpress/eslint-plugin (source)	^19.2.0 -> ^20.1.0

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Release Notes

WordPress/gutenberg (@​wordpress/eslint-plugin)

### [`v20.1.0`](https://togithub.com/WordPress/gutenberg/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#2010-2024-07-24) [Compare Source](https://togithub.com/WordPress/gutenberg/compare/@wordpress/eslint-plugin@20.0.0...@wordpress/eslint-plugin@20.1.0) ### [`v20.0.0`](https://togithub.com/WordPress/gutenberg/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#2000-2024-07-10) [Compare Source](https://togithub.com/WordPress/gutenberg/compare/@wordpress/eslint-plugin@19.2.0...@wordpress/eslint-plugin@20.0.0) ##### Breaking Changes - Add [`@typescript-eslint/no-unused-vars` rule](https://typescript-eslint.io/rules/no-unused-vars) to the recommended TypeScript ruleset ([#​62925](https://togithub.com/WordPress/gutenberg/pull/62925)). - Add [`@typescript-eslint/method-signature-style` rule](https://typescript-eslint.io/rules/method-signature-style) to the recommended TypeScript ruleset ([#​62718](https://togithub.com/WordPress/gutenberg/pull/62718)).

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