Fix reconnect on connection reset

According to the official documentation `fwrite`() returns `false`
when encountering an error.  In order to detect whether the connection
was reset we should therefore check for `false` and not `0`.

Author: schwarz-b5c

src/Wamp/Client.php

@@ -307,7 +307,7 @@ private function send($data, int $opcode = WebsocketPayload::OPCODE_TEXT): void
         );
 
         // Check if the connection was reset, if so try to reconnect
-        if (0 === @fwrite($this->socket, $encoded)) {
+        if (false === @fwrite($this->socket, $encoded)) {
             $this->connected = false;
             $this->connect($this->target);