feat(Checkbox): max can be string type

src/checkbox-group/index.js

@@ -7,7 +7,7 @@ export default createComponent({
   mixins: [ParentMixin('vanCheckbox')],
 
   props: {
-    max: Number,
+    max: [Number, String],
     disabled: Boolean,
     iconSize: [Number, String],
     checkedColor: String,

src/checkbox/README.md

@@ -202,7 +202,7 @@ export default {
 | Attribute | Description | Type | Default |
 |------|------|------|------|
 | v-model | Names of all checked checkboxes | *any[]* | - |
-| max | Maximum amount of checked options | *number* | `0`(Unlimited) |
+| max | Maximum amount of checked options | *string \| number* | `0`(Unlimited) |
 | disabled | Disable all checkboxes | *boolean* | `false` |
 | icon-size `v2.2.3` | Icon size of all checkboxes | *string \| number* | `20px` |
 | checked-color `v2.2.3` | Checked color of all checkboxes | *string* | `#1989fa` | - |

src/checkbox/README.zh-CN.md

@@ -219,7 +219,7 @@ export default {
 |------|------|------|------|
 | v-model | 所有选中项的标识符 | *any[]* | - |
 | disabled | 是否禁用所有复选框 | *boolean* | `false` |
-| max | 最大可选数，0 为无限制 | *number* | `0` |
+| max | 最大可选数，0 为无限制 | *string \| number* | `0` |
 | icon-size `v2.2.3` | 所有复选框的图标大小，默认单位为`px` | *string \| number* | `20px` |
 | checked-color `v2.2.3` | 所有复选框的选中状态颜色 | *string* | `#1989fa` |