tests

chore(dev-deps): bump @salesforce/cli-plugins-testkit #1536

Job	Run time
yarn-lockfile-check / lockfile-check	8s
linux-unit-tests / determine-node-versions	4s
linux-unit-tests / linux-unit-tests (current)	1m 17s
linux-unit-tests / linux-unit-tests (lts/*)	1m 20s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 20s
windows-unit-tests / determine-node-versions	2s
nuts (windows-latest) / yarn test:nuts	11m 2s
nuts (ubuntu-latest) / yarn test:nuts	2m 46s
windows-unit-tests / windows-unit-tests (current)	4m 12s
windows-unit-tests / windows-unit-tests (lts/*)	5m 42s
windows-unit-tests / windows-unit-tests (lts/-1)	4m 39s
	32m 32s

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