Adds SameSite attribute for cookies (#299)

Author: sikhlana

src/Swoole/SwooleClient.php

@@ -194,7 +194,8 @@ public function sendResponseHeaders(Response $response, SwooleResponse $swooleRe
                 $cookie->getPath(),
                 $cookie->getDomain(),
                 $cookie->isSecure(),
-                $cookie->isHttpOnly()
+                $cookie->isHttpOnly(),
+                $cookie->getSameSite()
             );
         }
     }