message: [Doc] Button api
diff: @@ -60,7 +60,7 @@ Vue.use(Button);
  | Attribute | Description | Type | Default |
  |------|------|------|------|
  | type | Can be set to `primary` `warning` `danger` | `String` | `default` |
  -| size | Can be set to `normal` `large` `small` `mini` | `String` | `normal` |
  +| size | Can be set to `large` `small` `mini` | `String` | `normal` |
  | text | Text | `String` | - |
  | tag | Tag | `String` | `button` |
  | native-type | Native Type Attribute | `String` | `''` |
  