Allow cloning SPIRC

- which is just a tokio::sync::mpsc sender, so this should be safe
- prep for MPRIS support, which will use this to control playback

Author: wisp3rwind

connect/src/spirc.rs

@@ -139,6 +139,7 @@ const VOLUME_UPDATE_DELAY: Duration = Duration::from_millis(500);
 const UPDATE_STATE_DELAY: Duration = Duration::from_millis(200);
 
 /// The spotify connect handle
+#[derive(Clone)]
 pub struct Spirc {
     commands: mpsc::UnboundedSender<SpircCommand>,
 }