chore: update to async-channel 2

src/events.rs

@@ -1,6 +1,7 @@
 //! # Events specification.
 
 use async_channel::{self as channel, Receiver, Sender, TrySendError};
+use pin_project::pin_project;
 
 mod payload;
 
@@ -64,7 +65,8 @@ impl Events {
 /// [`Context::get_event_emitter`]: crate::context::Context::get_event_emitter
 /// [`Stream`]: futures::stream::Stream
 #[derive(Debug, Clone)]
-pub struct EventEmitter(Receiver<Event>);
+#[pin_project]
+pub struct EventEmitter(#[pin] Receiver<Event>);
 
 impl EventEmitter {
     /// Async recv of an event. Return `None` if the `Sender` has been dropped.
@@ -77,10 +79,10 @@ impl futures::stream::Stream for EventEmitter {
     type Item = Event;
 
     fn poll_next(
-        mut self: std::pin::Pin<&mut Self>,
+        self: std::pin::Pin<&mut Self>,
         cx: &mut std::task::Context<'_>,
     ) -> std::task::Poll<Option<Self::Item>> {
-        std::pin::Pin::new(&mut self.0).poll_next(cx)
+        self.project().0.poll_next(cx)
     }
 }