tests

feat: add open_browser env var for testing #454

Job	Run time
yarn-lockfile-check / lockfile-check	17s
linux-unit-tests / determine-node-versions	4s
linux-unit-tests / prevent-typescript-dependency	0s
linux-unit-tests / linux-unit-tests (20.18.0)	1m 52s
linux-unit-tests / linux-unit-tests (18)	1m 59s
windows-unit-tests / determine-node-versions	3s
nuts (ubuntu-latest) / yarn test:nuts	42s
nuts (windows-latest) / yarn test:nuts	10m 8s
windows-unit-tests / windows-unit-tests (20.18.0)	6m 0s
windows-unit-tests / windows-unit-tests (18)	7m 53s
	28m 58s

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