chore(dev-deps): bump @salesforce/cli-plugins-testkit #1341

Job	Run time
yarn-lockfile-check / lockfile-check	7s
linux-unit-tests / determine-node-versions	4s
linux-unit-tests / prevent-typescript-dependency / prevent-typescript-dependency	17s
linux-unit-tests / linux-unit-tests (current)	1m 2s
linux-unit-tests / linux-unit-tests (lts/*)	1m 4s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 8s
windows-unit-tests / determine-node-versions	2s
nuts (windows-latest) / yarn test:nuts	7m 33s
nuts (ubuntu-latest) / yarn test:nuts	1m 38s
windows-unit-tests / windows-unit-tests (current)	2m 52s
windows-unit-tests / windows-unit-tests (lts/*)	3m 17s
windows-unit-tests / windows-unit-tests (lts/-1)	3m 47s
	22m 51s

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