websockets / ws / 31678629929

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[fix] Change the ready state after validating the arguments (#2337)

`Sender.prototype.close()` validates `code` and `data` and throws if
they are invalid. Do not change the ready state before it returns,
otherwise the state is set to `CLOSING` with no close frame sent and no
close timer set, and any subsequent `WebSocket.prototype.close()` call
becomes a noop because the state is already `CLOSING`.

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