Apply fixes from StyleCI (#123)

Author: mpociot

src/HttpApi/Controllers/Controller.php

@@ -43,7 +43,7 @@ public function onOpen(ConnectionInterface $connection, RequestInterface $reques
 
         $this->contentLength = $this->findContentLength($request->getHeaders());
 
-        $this->requestBuffer = (string)$request->getBody();
+        $this->requestBuffer = (string) $request->getBody();
 
         $this->checkContentLength($connection);
     }