fixed content type header

src/Utils/Controller/LuticateApplication.php

@@ -116,7 +116,7 @@ class LuticateApplication implements MessageComponentInterface
         
         $r = $this->dispatch($httpMethod, $url, $parameters);
         http_response_code($r->getStatusCode());
-        header("content-type", "application/json");
+        header("content-type: application/json");
         echo $r->__toString();
     }