A more robust check for rinfo.family since in some node version/os ri…

…nfo family returned value could be number.

src/transport/udp.ts

@@ -50,7 +50,9 @@ export class UDPTransportService
   }
 
   public handleIncoming = (data: Buffer, rinfo: IRemoteInfo): void => {
-    const multiaddr = new Multiaddr(`/${rinfo.family === "IPv4" ? "ip4" : "ip6"}/${rinfo.address}/udp/${rinfo.port}`);
+    const multiaddr = new Multiaddr(
+      `/${String(rinfo.family).endsWith("4") ? "ip4" : "ip6"}/${rinfo.address}/udp/${rinfo.port}`
+    );
     try {
       const packet = decodePacket(this.srcId, data);
       this.emit("packet", multiaddr, packet);