tests

chore(dev-deps): bump @salesforce/cli-plugins-testkit #1485

Job	Run time
yarn-lockfile-check / lockfile-check	7s
linux-unit-tests / determine-node-versions	1s
linux-unit-tests / linux-unit-tests (current)	1m 9s
linux-unit-tests / linux-unit-tests (lts/*)	1m 8s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 12s
windows-unit-tests / determine-node-versions	2s
nuts (ubuntu-latest) / yarn test:nuts	2m 47s
nuts (windows-latest) / yarn test:nuts	12m 12s
windows-unit-tests / windows-unit-tests (current)	2m 55s
windows-unit-tests / windows-unit-tests (lts/*)	3m 44s
windows-unit-tests / windows-unit-tests (lts/-1)	4m 24s
	29m 41s

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