build(deps-dev): bump @testing-library/jest-dom from 5.11.5 to 5.11.6 (#422)

Bumps [@testing-library/jest-dom](https://github.com/testing-library/jest-dom) from 5.11.5 to 5.11.6.
- [Release notes](https://github.com/testing-library/jest-dom/releases)
- [Changelog](https://github.com/testing-library/jest-dom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/testing-library/jest-dom/compare/v5.11.5...v5.11.6)

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