Add events for im_online (#3991)

* Add AllGood event for im_online

* Another event just in case.

* Bump runtime

substrate/core/network/src/protocol.rs

@@ -35,7 +35,6 @@ use sr_primitives::traits::{
 };
 use message::{BlockAnnounce, BlockAttributes, Direction, FromBlock, Message, RequestId};
 use message::generic::{Message as GenericMessage, ConsensusMessage};
-use event::Event;
 use consensus_gossip::{ConsensusGossip, MessageRecipient as GossipMessageRecipient};
 use light_dispatch::{LightDispatch, LightDispatchNetwork, RequestData};
 use specialization::NetworkSpecialization;

substrate/core/network/src/protocol/specialization.rs

@@ -43,7 +43,7 @@ pub trait NetworkSpecialization<B: BlockT>: Send + Sync + 'static {
 
 	/// Called when a network-specific event arrives.
 	#[deprecated(note = "This method is never called; please use `with_dht_event_tx` when building the service")]
-	fn on_event(&mut self, event: Event) {}
+	fn on_event(&mut self, _event: Event) {}
 
 	/// Called on abort.
 	#[deprecated(note = "This method is never called; aborting corresponds to dropping the object")]