chore: add build badges

yyx990803 · yyx990803 · commit 1ded378c292c · 2018-01-14T17:30:36.000-05:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# vue-cli
+# vue-cli [![Build Status](https://circleci.com/gh/vuejs/vue-cli/tree/next.svg?style=shield)](https://circleci.com/gh/vuejs/vue-loader/tree/next) [![Windows Build status](https://ci.appveyor.com/api/projects/status/487fqt71e4kf46iv/branch/next?svg=true)](https://ci.appveyor.com/project/yyx990803/vue-cli-6b0a6/branch/next)
 
 > WIP: this is the work in progress branch of the upcoming vue-cli 3.0.
 > Only for preview for template maintainers.

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-# vue-cli`
	`1`	`+# vue-cli [![Build Status](https://circleci.com/gh/vuejs/vue-cli/tree/next.svg?style=shield)](https://circleci.com/gh/vuejs/vue-loader/tree/next) [![Windows Build status](https://ci.appveyor.com/api/projects/status/487fqt71e4kf46iv/branch/next?svg=true)](https://ci.appveyor.com/project/yyx990803/vue-cli-6b0a6/branch/next)`
`2`	`2`
`3`	`3`	`> WIP: this is the work in progress branch of the upcoming vue-cli 3.0.`
`4`	`4`	`> Only for preview for template maintainers.`