fixed type hint

src/Utils/Controller/LuRoute.php

@@ -48,7 +48,7 @@ class LuRoute {
     /**
      * @param $middleware mixed
      */
-    public function addMiddleware(mixed $middleware)
+    public function addMiddleware($middleware)
     {
         if (is_string($middleware)) {
             $this->_middlewares[] = new LuMiddlewareDbo($middleware);