Support `wasm` target #379

Job	Run time
danger-check	28s
dump-unicode-data / generate-dump	4s
reviewdog	3m 37s
check-pr / check-style	3m 39s
check-pr / check-linux / check	5m 14s
check-pr / check-macos / check	5m 19s
check-pr / check-windows / check	4m 54s
	23m 15s

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