fix: await initial pushable read (#109) #152

Job	Run time
js-test-and-release / check	4m 34s
js-test-and-release / test-node (windows-latest, lts/*)	5m 45s
js-test-and-release / test-node (ubuntu-latest, lts/*)	2m 11s
js-test-and-release / test-node (macos-latest, lts/*)	5m 52s
js-test-and-release / test-chrome	2m 51s
js-test-and-release / test-chrome-webworker	2m 44s
js-test-and-release / test-firefox	3m 48s
js-test-and-release / test-firefox-webworker	3m 54s
js-test-and-release / test-electron-main	26s
js-test-and-release / test-electron-renderer	14s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	13s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	15s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	3m 30s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 42s
js-test-and-release / release-check	2s
js-test-and-release / release	4m 43s
	43m 44s

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