Update dependency @testing-library/react to ^9.3.0

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
@testing-library/react	devDependencies	minor	^9.3.0	source

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Release Notes

testing-library/react-testing-library

v9.3.0

Compare Source

Features

• debug: allow debugging an array of containers (#​495) (f2805d4)

v9.2.0

Compare Source

Features

• add pure bundle build (#​489) (594f858), closes #​486

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