[2.x] Fix fclose for socket

[rennokki]

When closing the socket with fclose, it seems like the $this->socket is false and fclose does not accept boolean:

$query = new SourceQuery;

try {
    $query->connect($this->host, $this->port, 5, SourceQuery::SOURCE); // the host and port are invalid/server is down
} catch (Exception $e) {
    return  [];
}

// Throws: TypeError: fclose(): Argument #1 ($stream) must be of type resource, bool given.
// Line: xpaw\php-source-query-class\SourceQuery\Socket.php:33
$query->disconnect();

The code formatting also knocks me off, it seems more related to C# than PSR-7. Are formatting PRs allowed?