test: add gateway conformance tests (#67) #227

Job	Run time
js-test-and-release / check	2m 22s
js-test-and-release / test-firefox	49s
js-test-and-release / test-chrome-webworker	40s
js-test-and-release / test-node (windows-latest, lts/*)	4m 44s
js-test-and-release / test-firefox-webworker	41s
js-test-and-release / test-node (ubuntu-latest, lts/*)	35s
js-test-and-release / test-node (macos-latest, lts/*)	3m 2s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	49s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	1m 12s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 40s
js-test-and-release / test-chrome	47s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	3m 26s
js-test-and-release / test-electron-main	39s
js-test-and-release / test-electron-renderer	35s
js-test-and-release / release-check	2s
js-test-and-release / release	3m 53s
	26m 56s

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