Update rcon-client

Update rcon-client to 4.2.0 in order to remove workaround for issue with
rcon-client 4.1.0 that has been resolved.

lib/factorio/server.js

@@ -621,15 +621,6 @@ class FactorioServer extends events.EventEmitter {
 		this._state = "stopping";
 		if (this._rconClient) {
 			await this._rconClient.end();
-
-			// Unfortunately version 4.1.0 of rcon-client doesn't send an
-			// end event on .end() and causes an error if the close operation
-			// fails.  Wait a bit here to ensure it's closed before killing
-			// Factorio.  This is only an issue on Windows where Factorio is
-			// terminated without cleanup.
-			await new Promise((resolve, reject) => {
-				setTimeout(resolve, 100);
-			});
 		}
 
 		// On linux this sends SIGTERM to the process.  On windows this

package.json

@@ -58,7 +58,7 @@
     "node-factorio-api": "^0.3.8",
     "node-forge": "^0.7.1",
     "prom-client": "^10.2.3",
-    "rcon-client": "^4.0.4",
+    "rcon-client": "^4.2.0",
     "request": "^2.83.0",
     "sanitizer": "^0.1.3",
     "simple-git": "^1.96.0",