Replace haystack and needle in strpos

Author: mazanax

lib/Response.php

@@ -95,7 +95,7 @@ private function prettifyHeaders($headers)
         return array_reduce(
             $headers,
             function ($result, $header) {
-                if (false === strpos(':', $header)) {
+                if (false === strpos($header, ':')) {
                     $result['Status'] = $header;
 
                     return $result;