README: link to v2 beta branch

Author: markus-wa

README.md

@@ -22,6 +22,12 @@ This library is intended to be used with `go 1.11` or higher as it is built usin
 It's recommended to use modules for consumers as well if possible.
 If you are unfamiliar with Go modules there's a [list of recommended resources](https://github.com/markus-wa/demoinfocs-golang/wiki/Go-Modules#recommended-links--articles) in the wiki.
 
+## v2.0.0 beta
+
+Would you like to be living in the future?
+
+Go check out [this README on the `v2` branch](https://github.com/markus-wa/demoinfocs-golang/tree/v2) instead.
+
 ## Go Get
 
 	go get -u github.com/markus-wa/demoinfocs-golang