fix: livereload port issue, fixed #26

Author: QingWei-Li

lib/commands/serve.js

@@ -22,8 +22,9 @@ module.exports = function (path, openInBrowser, port, livereloadPort) {
   }
 
   var server = connect()
-
-  server.use(livereload())
+  server.use(livereload({
+    port: livereloadPort
+  }))
   server.use(serveStatic(path))
   server.listen(port)
   lrserver.createServer({