fix: close when `createWsConn` failed #253

Job	Run time
build (windows, amd64)	29s
build (windows, 386)	21s
build (freebsd, amd64)	31s
build (freebsd, 386)	21s
build (openbsd, amd64)	30s
build (openbsd, 386)	21s
build (linux, amd64)	20s
build (linux, 386)	32s
build (dragonfly, amd64)	25s
build (darwin, amd64)	13s
build (darwin, arm64)	24s
build (linux, arm, 7)	21s
build (linux, arm, 6)	20s
build (linux, arm, 5)	17s
build (android, arm64)	24s
build (windows, arm64)	23s
build (windows, arm, 7)	18s
build (linux, arm64)	23s
build (linux, riscv64)	25s
build (linux, mips64)	22s
build (linux, mips64le)	24s
build (linux, mipsle)	19s
build (linux, mips)	25s
build (linux, mipsle, softfloat)	20s
build (linux, mips, softfloat)	21s
build (linux, ppc64)	21s
build (linux, ppc64le)	25s
build (freebsd, arm64)	25s
build (freebsd, arm, 7)	19s
build (linux, s390x)	24s
build (openbsd, arm64)	19s
build (openbsd, arm, 7)	29s
publish-new-formula	0s
	12m 11s

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