[improvement] CouponCell: add border prop (#1993)

packages/coupon-list/en-US.md

@@ -73,6 +73,7 @@ export default {
 | chosen-coupon | Index of chosen coupon | `Number` | `-1` |
 | coupons | Coupon list | `Array` | `[]` |
 | editable | Cell editable | `Boolean` | `true` |
+| border | Whether to show outer border | `Boolean` | `true` |
 
 ### CouponList API
 

packages/coupon-list/zh-CN.md

@@ -74,6 +74,7 @@ export default {
 | chosen-coupon | 当前选中优惠券的索引 | `Number` | `-1` | - |
 | coupons | 可用优惠券列表 | `Array` | `[]` | - |
 | editable | 能否切换优惠券 | `Boolean` | `true` | - |
+| border | 是否显示外边框 | `Boolean` | `true` | 1.3.10 |
 
 ### CouponList API