Derive `Debug` for `WebSocketStream<S>`

src/lib.rs

@@ -203,6 +203,7 @@ where
 /// through the respective `Stream` and `Sink`. Check more information about
 /// them in `futures-rs` crate documentation or have a look on the examples
 /// and unit tests for this crate.
+#[derive(Debug)]
 pub struct WebSocketStream<S> {
     inner: WebSocket<AllowStd<S>>,
 }