[improvement] Search: add input-align prop (#819)

packages/search/README.md

@@ -58,6 +58,7 @@ Search 支持自定义右侧取消按钮，使用名字为 action 的 slot 即
 | use-action-slot | 是否使用 action slot | `Boolean` | `false` |
 | placeholder | 输入框为空时占位符 | `String` | - |
 | placeholder-style | 指定 placeholder 的样式 | `String` | - |
+| input-align | 输入框内容对齐方式，可选值为 `center` `right` | `String` | `left` |
 
 ### Event
 

packages/search/index.ts

@@ -9,6 +9,7 @@ VantComponent({
     focus: Boolean,
     disabled: Boolean,
     readonly: Boolean,
+    inputAlign: String,
     showAction: Boolean,
     useActionSlot: Boolean,
     placeholder: String,

packages/search/index.wxml

@@ -14,6 +14,7 @@
       disabled="{{ disabled }}"
       readonly="{{ readony }}"
       maxlength="{{ maxlength }}"
+      input-align="{{ inputAlign }}"
       placeholder="{{ placeholder }}"
       placeholder-style="{{ placeholderStyle }}"
       custom-style="padding: 3px 10px"