Reorganize code for PSR and others code prettify.

src/Libs/Middleware.php

@@ -20,7 +20,8 @@ class Middleware {
      *
      * @return mixed
      */
-    public static function next(Neuron $req): mixed {
+    public static function next(Neuron $req): mixed
+    {
         $next = array_pop($req->next);
         return call_user_func_array($next, [$req]);
     }