Deps: Update async-tungstenite -> 0.12

This is a non-breaking change, since WsError is private.

src/ws.rs

@@ -195,6 +195,7 @@ pub(crate) async fn create_rustls_client(url: Url) -> Result<WsStream> {
             max_message_size: None,
             max_frame_size: None,
             max_send_queue: None,
+            ..Default::default()
         }),
     )
     .await
@@ -212,6 +213,7 @@ pub(crate) async fn create_native_tls_client(url: Url) -> Result<WsStream> {
             max_message_size: None,
             max_frame_size: None,
             max_send_queue: None,
+            ..Default::default()
         }),
     )
     .await?;