fix: async protocol may stuck at the last round forever if messages n…

…ot coming by order (#10)

src/async_runtime/mod.rs

@@ -178,7 +178,7 @@ where
 
     async fn proceed_if_needed(&mut self) -> Result<(), Error<SM::Err, IErr, O::Error>> {
         let mut state = self.state.take().ok_or(InternalError::MissingState)?;
-        if state.wants_to_proceed() {
+        while state.wants_to_proceed() {
             let (result, s) = tokio::task::spawn_blocking(move || (state.proceed(), state))
                 .await
                 .map_err(Error::ProceedPanicked)?;