tests

chore(dev-deps): bump @salesforce/cli-plugins-testkit #1506

Job	Run time
yarn-lockfile-check / lockfile-check	10s
linux-unit-tests / determine-node-versions	3s
linux-unit-tests / linux-unit-tests (current)	1m 11s
linux-unit-tests / linux-unit-tests (lts/*)	1m 9s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 8s
windows-unit-tests / determine-node-versions	1s
nuts (ubuntu-latest) / yarn test:nuts	7m 55s
nuts (windows-latest) / yarn test:nuts	11m 22s
windows-unit-tests / windows-unit-tests (current)	2m 48s
windows-unit-tests / windows-unit-tests (lts/*)	4m 8s
windows-unit-tests / windows-unit-tests (lts/-1)	4m 15s
	34m 10s

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