Update dependency @testing-library/dom to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@testing-library/dom	8.20.0 -> 9.3.0

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Release Notes

testing-library/dom-testing-library

v9.3.0

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Features

• waitFor: Support async unstable_advanceTimersWrapper (#​1229) (d09b3c2)

v9.2.0

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Features

• ByRole: Allow filter by value state (#​1223) (eadf748)

v9.1.0

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Features

• ByRole: Allow filter by busy state (#​1222) (8c40a21)

v9.0.1

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Bug Fixes

• Ensure MIT licensed lz-string is used (#​1219) (4da0f39)

v9.0.0

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Bug Fixes

• ByRole: Constrain API (#​1211) (746def6)

Features

• Drop support for Node.js 12.x (#​1207) (c37ea2e)

BREAKING CHANGES

• ByRole: Only allow string as a role.
  Drop support for exact, trim, collapseWhitespace, and normalizer options.
• Minimum supported Node.js version is now 14.x

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