update readme [ci-skip]

Author: yyx990803

README.md

@@ -1,6 +1,8 @@
 # vue-next [![CircleCI](https://img.shields.io/circleci/project/vuejs/vue/next.svg?maxAge=2592000)](https://circleci.com/gh/vuejs/vue/tree/next) [![Coverage](https://img.shields.io/codecov/c/github/vuejs/vue/next.svg)](https://codecov.io/gh/vuejs/vue/branch/next) [![Sauce Labs](https://saucelabs.com/open_sauce/build_status/vuejs.svg)](https://saucelabs.com/beta/builds/03f78da5c56a4e61bb80c61f1c01d7d8)
 
-> pre-alpha state, use at your own risk. For the time being, check out the [announcement post](https://medium.com/the-vue-point/announcing-vue-js-2-0-8af1bde7ab9#.jylu9wz4y) and the [feature comparison with 1.0](https://github.com/vuejs/vue/wiki/2.0-features).
+### Current status: BETA
+
+Checkout the [2.0 Changes](https://github.com/vuejs/vue/issues/2873) issue or the [WIP documentation](https://github.com/vuejs/vuejs.org/tree/2.0/src/guide).
 
 ### Build