fix: address new typescript linting error #47

Job	Run time
check	1m 18s
test-electron-main	41s
test-electron-renderer	17s
test-chrome	27s
test-chrome-webworker	39s
test-firefox	27s
test-node (windows-latest, lts/*)	2m 13s
test-node (ubuntu-latest, lts/*)	26s
test-node (macos-latest, lts/*)	1m 22s
test-webkit (ubuntu-latest, lts/*)	18s
test-webkit (macos-latest, lts/*)	1m 49s
test-firefox-webworker	33s
test-webkit-webworker (ubuntu-latest, lts/*)	24s
test-webkit-webworker (macos-latest, lts/*)	1m 32s
release	1m 3s
	13m 29s

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