Fix deprecation

lib/storage-handler.js

@@ -134,12 +134,12 @@ exports.download = function (provider, req, res, container, file, cb) {
   reader.on('error', function (err) {
     if (err.code === 'ENOENT') {
       res.type('application/json');
-      res.send(404, { error: err });
+      res.status(404).send({ error: err });
       return;
     }
 
     res.type('application/json');
-    res.send(500, { error: err });
+    res.status(500).send({ error: err });
   });
 }