fix: `stateHandlers` type in `VerifierOptions` #1832

Job	Run time
build-and-test (16.x, macos-latest)	12m 19s
build-and-test (16.x, ubuntu-latest)	7m 25s
build-and-test (16.x, windows-latest)	15m 32s
build-and-test (18.x, macos-latest)	9m 4s
build-and-test (18.x, ubuntu-latest)	11m 8s
build-and-test (18.x, windows-latest)	18m 24s
build-and-test (20.x, macos-latest)	5m 52s
build-and-test (20.x, ubuntu-latest)	10m 1s
build-and-test (20.x, windows-latest)	3m 17s
	1h 33m 2s

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