Update README.md

Author: vishr

README.md

@@ -1,5 +1,7 @@
 # [Echo](http://labstack.com/echo) [![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/labstack/echo) [![License](http://img.shields.io/badge/license-mit-blue.svg?style=flat-square)](https://raw.githubusercontent.com/labstack/echo/master/LICENSE) [![Build Status](http://img.shields.io/travis/labstack/echo.svg?style=flat-square)](https://travis-ci.org/labstack/echo) [![Coverage Status](http://img.shields.io/coveralls/labstack/echo.svg?style=flat-square)](https://coveralls.io/r/labstack/echo) [![Join the chat at https://gitter.im/labstack/echo](https://img.shields.io/badge/gitter-join%20chat-brightgreen.svg?style=flat-square)](https://gitter.im/labstack/echo) [![Twitter](https://img.shields.io/badge/[email protected]?style=flat-square)](https://twitter.com/labstack)
 
+## Don't forget to try the upcomping [v3](https://github.com/labstack/echo/tree/v3) tracked [here]( https://github.com/labstack/echo/issues/665)
+
 #### Fast and unfancy HTTP server framework for Go (Golang). Up to 10x faster than the rest.
 
 ## Feature Overview