bmrng 🪃

An async MPSC request-response channel for Tokio, where you can send a response to the sender.
Inspired by crossbeam_requests.
Example
```rust
[tokio::main]
async fn main() {
let buffersize = 100;
let (tx, mut rx) = bmrng::channel::(buffersize);
tokio::spawn(async move {
match rx.recv().await {
Ok((input, mut responder)) => {
let res = responder.respond(input * input);
asserteq!(res.isok(), true);
}
Err(err) => {
panic!(err);
}
}
});
let response = tx.sendreceive(8).await;
asserteq!(response.unwrap(), 64);
}
```