Add support for installation use Vue.use

Author: savoygu

README.md

@@ -13,7 +13,8 @@ npm install vue-multiple-progress -S
 ```bash
 import Vue from 'vue'
 import Progress from 'vue-multiple-progress'
-Vue.use('VmProgress', Progress)
+# Vue.component('vm-progress', Progress) # 可以指定组件名称
+Vue.use(Progress) # 组件名称 `vm-progress`
 ```
 
 For more information, please refer to [Progress](https://vue-multiple.github.io/progress) in our documentation.

example/src/main.js

@@ -2,7 +2,8 @@ import Vue from 'vue'
 import App from './App.vue'
 
 import Progress from '../../src/index.js'
-Vue.component(Progress.name, Progress)
+// Vue.component('vm-progress', Progress)
+Vue.use(Progress)
 
 import VueDemonstration from 'vue-demonstration'
 Vue.component('demonstration', VueDemonstration)

src/index.js

@@ -10,4 +10,6 @@ if (typeof window !== 'undefined' && window.Vue) {
   Vue.component('VmProgress', Progress)
 }
 
+Progress.install = install
+
 export default Progress