WASM is not supported

[imaNNeo]

Hi there, I just realized that the Nakama SDK is not compatible with Flutter WASM.
It's simple to reproduce, just run the app using --wasm parameter and it doesn't work (the APIs I mean),
And in my own case, I get this error:
Unsupported operation: No implementation of the connect api provided

We just need to upgrade the dio and web_socket_channel dependencies to be compatible with WASM
(I tested it and it works with this change, I'm gonna create a PR now)