Dev (#451)

Sync master - dev

Author: mdhsl

README.md

@@ -110,4 +110,5 @@ $ ENV=latest yarn vuepress
 
 The official website (latest): [http://opensensorhub.github.io/osh-js/latest/site/](http://opensensorhub.github.io/osh-js/latest/site/)
 
-The official website (development): [http://opensensorhub.github.io/osh-js/dev/site/](http://opensensorhub.github.io/osh-js/dev/site/)
+The official website (development): [http://opensensorhub.github.io/osh-js/dev/site/](http://opensensorhub.github.io/osh-js/dev/site/)
+