refactor: reset ping timeout on any incoming packet (#706)

The client will now match the behavior of the server.

See also: socketio/engine.io@be7b4e7

lib/socket.ts

@@ -663,14 +663,14 @@ export class Socket extends Emitter<
 
       // Socket is live - any packet counts
       this.emitReserved("heartbeat");
+      this.resetPingTimeout();
 
       switch (packet.type) {
         case "open":
           this.onHandshake(JSON.parse(packet.data));
           break;
 
         case "ping":
-          this.resetPingTimeout();
           this.sendPacket("pong");
           this.emitReserved("ping");
           this.emitReserved("pong");