Merge pull request dingo#1225 from joaoffm/closure-middleware

FIX dingo#1220 Closure middleware: explode() expects parameter 2 to be string, object given

Author: hskrasek

src/Http/Middleware/Request.php

@@ -153,6 +153,10 @@ public function terminate($request, $response)
         }
 
         foreach ($middlewares as $middleware) {
+            if ($middleware instanceof Closure) {
+                continue;
+            }
+
             list($name, $parameters) = $this->parseMiddleware($middleware);
 
             $instance = $this->app->make($name);