[new feature] Coupon add 'showExchangeBar' prop && add empty style (#243)

* [bugfix] Checkbox border render error in weixin browser

* [bugfix] TreeSelect dependency path error

* [bugfix] Swipe should clear autoplay timer when destroyed

* [bugfix] Optimize component dependency analyze when build style entry

* merge

* update yarn.lock

* update README.md

* update README.md

* update README.md

* update README.md

* update README.md

* [Doc] add more badges in README.md

* update README.md

* [bugfix] Address & Contact list style

* fix: contact test cases

* [bugfix] popup style missing when build style entry

* [bugfix] Search: onSearch event arguments missing

* [Doc] add demo pages

* update zan-doc@0.3.7

* fix: build entry error

* [Doc] add goods demo

* [bugfix] button primary background color

* [Doc] update doc detail

* [new feature] Coupon add 'showExchangeBar' prop && add empty style

packages/coupon-list/index.vue

@@ -1,10 +1,10 @@
 <template>
   <div class="van-coupon-list">
-    <van-cell-group class="van-coupon-list__top">
-      <van-field v-model="exchangeCode" :placeholder="inputPlaceholder" :maxlength="20" />
+    <van-cell-group class="van-coupon-list__top" v-if="showExchangeBar">
+      <van-field class="van-coupon-list__filed van-hairline--surround" v-model="exchangeCode" :placeholder="inputPlaceholder" :maxlength="20" />
       <van-button size="small" type="danger" class="van-coupon-list__exchange" :disabled="exchangeButtonDisabled || !exchangeCode.length" @click="onClickExchangeButton">{{ exchangeButtonText }}</van-button>
     </van-cell-group>
-    <div class="van-coupon-list__list" ref="list">
+    <div :class="['van-coupon-list__list', { 'van-coupon-list--with-exchange': showExchangeBar }]" ref="list">
       <van-coupon-item
         ref="card"
         v-for="(item, index) in coupons"
@@ -20,6 +20,10 @@
         :key="item.id || item.name"
         :data="item"
       />
+      <div class="van-coupon-list__empty">
+        <img src="https://b.yzcdn.cn/v2/image/wap/trade/new_order/empty@2x.png" >
+        <p>暂无优惠券</p>
+      </div>
     </div>
     <div class="van-coupon-list__close van-hairline--top" @click="onClickNotUse">{{ closeButtonText }}</div>
   </div>
@@ -81,6 +85,10 @@ export default {
     inputPlaceholder: {
       type: String,
       default: '请输入优惠码'
+    },
+    showExchangeBar: {
+      type: Boolean,
+      default: true
     }
   },