chore(dev-deps): bump @salesforce/cli-plugins-testkit #111

Job	Run time
yarn-lockfile-check / lockfile-check	9s
linux-unit-tests / determine-node-versions	4s
linux-unit-tests / prevent-typescript-dependency / prevent-typescript-dependency	21s
linux-unit-tests / linux-unit-tests (current)	1m 21s
linux-unit-tests / linux-unit-tests (lts/*)	1m 24s
linux-unit-tests / linux-unit-tests (lts/-1)	1m 25s
windows-unit-tests / determine-node-versions	2s
nuts (ubuntu-latest) / yarn test:nuts	4m 26s
nuts (windows-latest) / yarn test:nuts	9m 18s
windows-unit-tests / windows-unit-tests (current)	3m 32s
windows-unit-tests / windows-unit-tests (lts/*)	3m 32s
windows-unit-tests / windows-unit-tests (lts/-1)	4m 4s
	29m 38s

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