message: docs(Dialog): add allow-html prop
diff: @@ -133,6 +133,7 @@ export default {
  | closeOnPopstate `v2.0.5` | Whether to close when popstate | _boolean_ | `false` |
  | closeOnClickOverlay | Whether to close when click overlay | _boolean_ | `false` |
  | lockScroll | Whether to lock body scroll | _boolean_ | `true` |
  +| allowHtml `v2.8.7` | Whether to allow HTML rendering in message | _boolean_ | `true` |
  | beforeClose | Callback before close,<br>call done() to close dialog,<br>call done(false) to cancel loading | (action: string, done: Function) => void | - |
  | transition `v2.2.6` | Transition, equivalent to `name` prop of [transtion](https://vuejs.org/v2/api/#transition) | _string_ | - |
  | getContainer | Return the mount node for Dialog | _string \| () => Element_ | `body` |
  @@ -159,6 +160,7 @@ export default {
  | close-on-click-overlay | Whether to close when click overlay | _boolean_ | `false` |
  | lazy-render | Whether to lazy render util appeared | _boolean_ | `true` |
  | lock-scroll | Whether to lock background scroll | _boolean_ | `true` |
  +| allow-html `v2.8.7` | Whether to allow HTML rendering in message | _boolean_ | `true` |
  | before-close | Callback before close,<br>call done() to close dialog,<br>call done(false) to cancel loading | (action: string, done: Function) => void | - |
  | transition `v2.2.6` | Transition, equivalent to `name` prop of [transtion](https://vuejs.org/v2/api/#transition) | _string_ | - |
  | get-container | Return the mount node for Dialog | _string \| () => Element_ | - |
  