message: docs(ContactCard): use composition api
diff: @@ -42,21 +42,24 @@ export default {
  ```
  ```js
  +import { reactive } from 'vue';
  import { Toast } from 'vant';
  export default {
  - data() {
  - return {
  - currentContact: {
  + setup() {
  + const currentContact = reactive({
  name: 'John Snow',
  tel: '13000000000',
  - },
  - };
  - },
  - methods: {
  - onEdit() {
  + });
  +
  + const onEdit = () => {
  Toast('edit');
  - },
  + };
  +
  + return {
  + onEdit,
  + currentContact,
  + };
  },
  };
  ```
  