tests

chore(dev-deps): bump @oclif/plugin-help from 6.0.18 to 6.0.20 #681

Job	Run time
yarn-lockfile-check / lockfile-check	6s
linux-unit-tests / determine-node-versions	3s
linux-unit-tests / linux-unit-tests (lts/*)	23s
linux-unit-tests / linux-unit-tests (lts/-1)	28s
sf-integration-tests (ubuntu-latest)	56s
integration-tests (ubuntu-latest, test:integration:install)	3m 12s
sf-integration-tests (windows-latest)	5m 8s
integration-tests (ubuntu-latest, test:integration:link)	40s
integration-tests (windows-latest, test:integration:install)	28m 27s
windows-unit-tests / determine-node-versions	2s
windows-unit-tests / windows-unit-tests (lts/*)	2m 39s
windows-unit-tests / windows-unit-tests (lts/-1)	2m 41s
	44m 45s

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