Merge pull request #2 from Kekos/silent-sockets

Make writes to sockets silent with the @-operator to avoid PHP notices when the socket has been closed by the server.

Author: Namoshek

src/MQTTClient.php

@@ -1296,7 +1296,7 @@ protected function writeToSocket(string $data, int $length = null): void
 
         $length = min($length, strlen($data));
 
-        $result = fwrite($this->socket, $data, $length);
+        $result = @fwrite($this->socket, $data, $length);
 
         if ($result === false || $result !== $length) {
             $this->logger->error('Sending data over the socket to an MQTT broker failed.', [