API changed

API changed response code of setting `X-Account-Meta-Temp-URL-Key`
from
`HTTP/1.1 204 No Content`
to
`HTTP/1.1 202 Accepted`

Author: re8us

src/SelectelStorage.php

@@ -312,7 +312,7 @@ public function setAccountMetaTempURLKey($key) {
                 ->request("POST")
                 ->getHeaders();
 
-        if (!in_array($res["HTTP-Code"], array(204)))
+        if (!in_array($res["HTTP-Code"], array(202)))
             return $this->error($res ["HTTP-Code"], __METHOD__);
 
         return $res["HTTP-Code"];