feat: remove Sync bounds

Author: MegaRedHand

concurrency/src/tasks/gen_server.rs

@@ -135,8 +135,8 @@ pub enum InitResult<G: GenServer> {
 }
 
 pub trait GenServer: Send + Sized {
-    type CallMsg: Send + Sized + Sync;
-    type CastMsg: Send + Sized + Sync;
+    type CallMsg: Send + Sized;
+    type CastMsg: Send + Sized;
     type OutMsg: Send + Sized;
     type Error: Debug + Send;
 

concurrency/src/tasks/time.rs

@@ -62,9 +62,11 @@ where
             let genserver_cancel_fut = pin!(gen_server_cancellation_token.cancelled());
             let cancel_conditions = select(cancel_token_fut, genserver_cancel_fut);
 
-            let async_block = pin!(async {
+            let message_clone = message.clone();
+            let handle_reference = &mut handle;
+            let async_block = pin!(async move {
                 rt::sleep(period).await;
-                let _ = handle.cast(message.clone()).await;
+                let _ = handle_reference.cast(message_clone).await;
             });
             let result = select(cancel_conditions, async_block).await;
             match result {