[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

docs/demos/views/address-list.vue

@@ -0,0 +1,60 @@
+<template>
+  <demo-section>
+    <demo-block :title="$t('basicUsage')">
+      <van-address-list
+        v-model="chosenAddressId"
+        :list="list"
+        @add="onAdd"
+        @edit="onEdit"
+      />
+    </demo-block>
+  </demo-section>
+</template>
+
+<script>
+export default {
+  i18n: {
+    'zh-CN': {
+
+    },
+    'en-US': {
+
+    }
+  },
+
+  data() {
+    return {
+      chosenAddressId: '1',
+      list: [
+        {
+          id: '1',
+          name: '张三',
+          tel: '13000000000',
+          address: '浙江省杭州市西湖区文三路 138 号东方通信大厦 7 楼 501 室'
+        },
+        {
+          id: '2',
+          name: '李四',
+          tel: '1310000000',
+          address: '浙江省杭州市拱墅区莫干山路 50 号'
+        },
+        {
+          id: '3',
+          name: '王五',
+          tel: '1320000000',
+          address: '浙江省杭州市滨江区江南大道 15 号'
+        }
+      ]
+    }
+  },
+
+  methods: {
+    onAdd() {
+      Toast('新增收货地址');
+    },
+    onEdit(item, index) {
+      Toast('编辑收货地址:' + index);
+    }
+  }
+};
+</script>