chore(dev-deps): bump @salesforce/cli-plugins-testkit #1455

Job	Run time
yarn-lockfile-check / lockfile-check	10s
linux-unit-tests / determine-node-versions	2s
linux-unit-tests / prevent-typescript-dependency / prevent-typescript-dependency	16s
linux-unit-tests / linux-unit-tests (current)	1m 48s
linux-unit-tests / linux-unit-tests (lts/*)	1m 50s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 48s
windows-unit-tests / determine-node-versions	2s
nuts (ubuntu-latest, yarn test:nuts:legacy) / yarn test:nuts:legacy	5m 11s
nuts (windows-latest, yarn test:nuts) / yarn test:nuts	44m 22s
nuts (ubuntu-latest, yarn test:nuts) / yarn test:nuts	19m 10s
nuts (windows-latest, yarn test:nuts:legacy) / yarn test:nuts:legacy	12m 45s
windows-unit-tests / windows-unit-tests (current)	4m 11s
windows-unit-tests / windows-unit-tests (lts/*)	4m 38s
windows-unit-tests / windows-unit-tests (lts/-1)	4m 54s
	1h 41m 7s

Provide feedback