Changed deprecated res.send(status) to res.sendStatus(status) (#1912)

Author: emadehsan

src/middlewares.js

@@ -198,7 +198,7 @@ var allowCrossDomain = function(req, res, next) {
 
   // intercept OPTIONS method
   if ('OPTIONS' == req.method) {
-    res.send(200);
+    res.sendStatus(200);
   }
   else {
     next();