[Bugfix] delete unnecessary coupon desc (#360)

* fix: Tabbar icon line-height

* [new feature] progress add showPivot prop

* [new feature] TabItem support vue-router

* [new feature] update document header style

* [Doc] add toast english ducoment

* [bugfix] Search box-sizing wrong

* [Doc] update vant-demo respo

* [Doc] translate theme & demo pages

* [Doc] add Internationalization document

* [bugfix] remove unnecessary props

* [fix] optimize clickoutside

* [new feature] optimize find-parent

* [new feature]: change document title accordinng to language

* [new feature] Pagination code review

* [improvement] adjust icon-font unicode

* [improvement] Icon spinner color inherit

* [improvement] icon default width

* [bugfix] DateTimePicker validate date props

* [bugfix] Tab item text ellipsis

* [improvement] optimize single line ellipsis

* [Improvement] optimzie staticClass

* [Improvement] Button: use sfc instread of jsx

* [Improvement] update actionsheet close icon style

* fix: yarn.lock

* fix: icon test cases

* [bugfix] errors during ssr

* [Improvement] SubmitBar add left slot

* [new feature] ImagePreview support manually close

* fix: ImagePreview test case

* [Doc] add switch lang button in mobile

* [bugfix] Popup overlay style update

* [bugfix] NavBar click event

* [Improvement] optimize build speed

* [new feature] CellSwipe support async controll

* [new feature] Uploader support inherit attrs

* [Bugfix] delete unnecessary coupon desc

* fix: coupon test case

docs/markdown/en-US/quickstart.md

@@ -55,6 +55,6 @@ Vue.use(Vant);
 <!-- import style -->
 <link rel="stylesheet" href="https://unpkg.com/vant/lib/vant-css/index.css" />
 
-<!-- import script --><script></script>
+<!-- import script -->
 <script src="https://unpkg.com/vant/lib/vant.min.js"></script>
 ```