fix compile warnings (#10993)

* fix warnings

* fix: failing build, use `spec` as dev-dependency

util/network/src/error.rs

@@ -145,7 +145,7 @@ impl From<Option<io::Error>> for AddressResolveError {
 }
 
 impl error::Error for Error {
-	fn source(&self) -> Option<&(error::Error + 'static)> {
+	fn source(&self) -> Option<&(dyn error::Error + 'static)> {
 		match self {
 			Error::Decompression(e) => Some(e),
 			Error::Rlp(e) => Some(e),

util/network/src/lib.rs

@@ -75,7 +75,7 @@ pub enum NetworkIoMessage {
 	/// Register a new protocol handler.
 	AddHandler {
 		/// Handler shared instance.
-		handler: Arc<NetworkProtocolHandler + Sync>,
+		handler: Arc<dyn NetworkProtocolHandler + Sync>,
 		/// Protocol Id.
 		protocol: ProtocolId,
 		/// Supported protocol versions and number of packet IDs reserved by the protocol (packet count).
@@ -361,15 +361,15 @@ impl<'a, T> NetworkContext for &'a T where T: ?Sized + NetworkContext {
 /// `Message` is the type for message data.
 pub trait NetworkProtocolHandler: Sync + Send {
 	/// Initialize the handler
-	fn initialize(&self, _io: &NetworkContext) {}
+	fn initialize(&self, _io: &dyn NetworkContext) {}
 	/// Called when new network packet received.
-	fn read(&self, io: &NetworkContext, peer: &PeerId, packet_id: u8, data: &[u8]);
+	fn read(&self, io: &dyn NetworkContext, peer: &PeerId, packet_id: u8, data: &[u8]);
 	/// Called when new peer is connected. Only called when peer supports the same protocol.
-	fn connected(&self, io: &NetworkContext, peer: &PeerId);
+	fn connected(&self, io: &dyn NetworkContext, peer: &PeerId);
 	/// Called when a previously connected peer disconnects.
-	fn disconnected(&self, io: &NetworkContext, peer: &PeerId);
+	fn disconnected(&self, io: &dyn NetworkContext, peer: &PeerId);
 	/// Timer function called after a timeout created with `NetworkContext::timeout`.
-	fn timeout(&self, _io: &NetworkContext, _timer: TimerToken) {}
+	fn timeout(&self, _io: &dyn NetworkContext, _timer: TimerToken) {}
 }
 
 /// Non-reserved peer modes.