chore(dev-deps): bump @salesforce/cli-plugins-testkit #1458

Job	Run time
yarn-lockfile-check / lockfile-check	6s
linux-unit-tests / determine-node-versions	3s
linux-unit-tests / prevent-typescript-dependency / prevent-typescript-dependency	20s
linux-unit-tests / linux-unit-tests (current)	3m 20s
linux-unit-tests / linux-unit-tests (lts/*)	1m 49s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 58s
windows-unit-tests / determine-node-versions	7s
nuts (ubuntu-latest, yarn test:nuts) / yarn test:nuts	1h 17m 1s
nuts (windows-latest, yarn test:nuts:legacy) / yarn test:nuts:legacy	13m 42s
nuts (ubuntu-latest, yarn test:nuts:legacy) / yarn test:nuts:legacy	10m 32s
nuts (windows-latest, yarn test:nuts) / yarn test:nuts	37m 11s
windows-unit-tests / windows-unit-tests (current)	3m 36s
windows-unit-tests / windows-unit-tests (lts/*)	5m 34s
windows-unit-tests / windows-unit-tests (lts/-1)	4m 35s
	2h 39m 54s

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