chore(deps): update dependency @typescript-eslint/eslint-plugin to v4.9.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@typescript-eslint/eslint-plugin	4.9.0 -> 4.9.1

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Release Notes

typescript-eslint/typescript-eslint

### [`v4.9.1`](https://togithub.com/typescript-eslint/typescript-eslint/blob/master/CHANGELOG.md#​491-httpsgithubcomtypescript-eslinttypescript-eslintcomparev490v491-2020-12-07) [Compare Source](https://togithub.com/typescript-eslint/typescript-eslint/compare/v4.9.0...v4.9.1) ##### Bug Fixes - **eslint-plugin:** [method-signature-style] fix crash with methods without a return type ([#​2836](https://togithub.com/typescript-eslint/typescript-eslint/issues/2836)) ([fed89f2](https://togithub.com/typescript-eslint/typescript-eslint/commit/fed89f24ebe42a6412f0eb19949d5d4771656189)), closes [#​2834](https://togithub.com/typescript-eslint/typescript-eslint/issues/2834) - **eslint-plugin:** [no-unused-vars] false-positive with class expressions ([#​2833](https://togithub.com/typescript-eslint/typescript-eslint/issues/2833)) ([aadb39f](https://togithub.com/typescript-eslint/typescript-eslint/commit/aadb39f0ff500ee99ea80e9009ab61283ca9c8cd)), closes [#​2831](https://togithub.com/typescript-eslint/typescript-eslint/issues/2831) - **eslint-plugin:** [no-unused-vars] fix race condition between naming-convention and no-unused-vars ([#​2848](https://togithub.com/typescript-eslint/typescript-eslint/issues/2848)) ([ccb6b94](https://togithub.com/typescript-eslint/typescript-eslint/commit/ccb6b9499a4a4077f2e3d81d0844860a25244a0f)), closes [#​2844](https://togithub.com/typescript-eslint/typescript-eslint/issues/2844)

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