[new feature] add i18n support (#310)

* fix: Tabbar icon line-height

* [new feature] progress add showPivot prop

* [new feature] TabItem support vue-router

* [new feature] update document header style

* [Doc] add toast english ducoment

* [new feature] add i18n support

* feat: Extract demos from markdown

* feat: Base components demos

* [new feature] complete demo extract & translate

* [fix] text cases

* fix: add deepAssign test cases

* fix: changelog detail

* [new feature] AddressEdit support i18n

packages/area/index.vue

@@ -36,9 +36,7 @@ export default {
   props: {
     value: {},
     areaList: Object,
-    /**
-     * 省市县显示列数，3-省市县，2-省市，1-省
-     */
+    // 省市县显示列数，3-省市县，2-省市，1-省
     columnsNum: {
       type: [String, Number],
       default: 3