fix: fixes cache leak and unhandled promise rejection #300

Job	Run time
js-test-and-release / check	2m 1s
js-test-and-release / test-chrome	32s
js-test-and-release / test-electron-renderer	29s
js-test-and-release / test-chrome-webworker	31s
js-test-and-release / test-electron-main	30s
js-test-and-release / test-firefox-webworker	30s
js-test-and-release / test-firefox	37s
js-test-and-release / test-node (windows-latest, lts/*)	3m 21s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	1m 11s
js-test-and-release / test-node (ubuntu-latest, lts/*)	41s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 28s
js-test-and-release / test-node (macos-latest, lts/*)	2m 36s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	1m 6s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	2m 0s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	18m 33s

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