fix: Sharding Issues & Cleanup (#2952)

* fix: Sharding causing constant heartbeat / identify spam

* misc: Remove wait param in connect

* misc: Wait 2.5 seconds before sending identify again if session is resumable

* misc: Remove useless destroy call

* nit: Capitalization

* fix: Identify on HELLO not connectionOpen

* misc: Add different intervals for identify after invalid session
- 2500 if we couldn't resume in time
- 5000 if we didn't have a session ID (per the docs on identify, that a client can only connect every 5 seconds)
- Otherwise, just identify again

* misc: Only clear heartbeat if shard is fully dead

Reconnect clears it otherwise

* fix: Accessing .length on a Collection

src/structures/ClientPresence.js

@@ -15,10 +15,10 @@ class ClientPresence extends Presence {
       this.client.ws.broadcast({ op: OPCodes.STATUS_UPDATE, d: packet });
     } else if (Array.isArray(presence.shardID)) {
       for (const shardID of presence.shardID) {
-        this.client.ws.shards[shardID].send({ op: OPCodes.STATUS_UPDATE, d: packet });
+        this.client.ws.shards.get(shardID).send({ op: OPCodes.STATUS_UPDATE, d: packet });
       }
     } else {
-      this.client.ws.shards[presence.shardID].send({ op: OPCodes.STATUS_UPDATE, d: packet });
+      this.client.ws.shards.get(presence.shardID).send({ op: OPCodes.STATUS_UPDATE, d: packet });
     }
     return this;
   }