Restore use of SyncOutsideWasm for EventHandlers

Author: Daniel Salinas

crates/matrix-sdk/src/event_handler/mod.rs

@@ -48,7 +48,7 @@ use anymap2::any::CloneAnySendSync;
 use futures_util::stream::{FuturesUnordered, StreamExt};
 use matrix_sdk_base::{
     deserialized_responses::{EncryptionInfo, SyncTimelineEvent},
-    SendOutsideWasm,
+    SendOutsideWasm, SyncOutsideWasm,
 };
 use ruma::{events::AnySyncStateEvent, push::Action, serde::Raw, OwnedRoomId};
 use serde::{de::DeserializeOwned, Deserialize};
@@ -509,7 +509,7 @@ macro_rules! impl_event_handler {
         impl<Ev, Fun, Fut, $($ty),*> EventHandler<Ev, ($($ty,)*)> for Fun
         where
             Ev: SyncEvent,
-            Fun: FnOnce(Ev, $($ty),*) -> Fut + Clone + Send + Sync + 'static,
+            Fun: FnOnce(Ev, $($ty),*) -> Fut + Clone + SendOutsideWasm + SyncOutsideWasm + 'static,
             Fut: EventHandlerFuture,
             $($ty: EventHandlerContext),*
         {