parse_url does not return port as array, but it is used as array in Request.php

So I added a check, wether this is an array actually, else I use the port as intended as int. I would assume, that that array check is needless altogether but maybe old PHP versions needed that?

src/Unirest/Request.php

@@ -555,7 +555,7 @@ class Request
             $query = '?' . http_build_query(self::getArrayFromQuerystring($query));
         }
 
-        if ($port && $port[0] !== ':') {
+        if ($port && (!is_array($port) || $port[0] !== ':')) {
             $port = ':' . $port;
         }