Update dependency eslint-plugin-testing-library to v4.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-plugin-testing-library	4.7.0 -> 4.9.0

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Release Notes

testing-library/eslint-plugin-testing-library

### [`v4.9.0`](https://togithub.com/testing-library/eslint-plugin-testing-library/releases/v4.9.0) [Compare Source](https://togithub.com/testing-library/eslint-plugin-testing-library/compare/v4.8.0...v4.9.0) ##### Features - **no-unnecessary-act:** add `isStrict` option ([#​404](https://togithub.com/testing-library/eslint-plugin-testing-library/issues/404)) ([b68d66b](https://togithub.com/testing-library/eslint-plugin-testing-library/commit/b68d66b88209a22f81b365385d88b8f342d5e937)), closes [#​382](https://togithub.com/testing-library/eslint-plugin-testing-library/issues/382) ### [`v4.8.0`](https://togithub.com/testing-library/eslint-plugin-testing-library/releases/v4.8.0) [Compare Source](https://togithub.com/testing-library/eslint-plugin-testing-library/compare/v4.7.0...v4.8.0) ##### Features - new `prefer-query-by-disappearance` rule ([#​402](https://togithub.com/testing-library/eslint-plugin-testing-library/issues/402)) ([b94437a](https://togithub.com/testing-library/eslint-plugin-testing-library/commit/b94437ae747f2458b0aada5fb3540783aae1c237)), closes [#​399](https://togithub.com/testing-library/eslint-plugin-testing-library/issues/399)

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