fix: turn off no-undef for ts files (#229) #120

Job	Run time
check	1m 7s
test-node (windows-latest, lts/*)	2m 15s
test-node (ubuntu-latest, lts/*)	14s
test-chrome-webworker	19s
test-node (macos-latest, lts/*)	1m 9s
test-firefox	10s
test-chrome	14s
test-firefox-webworker	16s
test-webkit (ubuntu-latest, lts/*)	16s
test-webkit (macos-latest, lts/*)	1m 8s
test-webkit-webworker (ubuntu-latest, lts/*)	12s
test-electron-main	20s
test-electron-renderer	19s
test-webkit-webworker (macos-latest, lts/*)	1m 20s
release	1m 29s
	10m 48s

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