chore(dev-deps): bump @salesforce/cli-plugins-testkit #843

Job	Run time
yarn-lockfile-check / lockfile-check	8s
linux-unit-tests / determine-node-versions	1s
linux-unit-tests / linux-unit-tests (current)	1m 2s
linux-unit-tests / linux-unit-tests (lts/*)	1m 0s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 2s
windows-unit-tests / determine-node-versions	2s
nuts (ubuntu-latest) / yarn test:nuts	56s
nuts (windows-latest) / yarn test:nuts	7m 0s
nuts (macos-latest) / yarn test:nuts	1m 45s
windows-unit-tests / windows-unit-tests (current)	3m 22s
windows-unit-tests / windows-unit-tests (lts/*)	4m 35s
windows-unit-tests / windows-unit-tests (lts/-1)	5m 10s
	26m 3s

Provide feedback