Less strict about message type of JSON payload

[typeless]

I am troubleshooting a stock broker's API that employs WebSocket.
It turns out that it sends JSON payloads with the binary type, which makes the wsjson API unusable.

Please consider removing the restriction if that makes sense.

[nhooyr]

Yea I suppose it isn't really a big deal for wsjson whether the message type is binary or text.