[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/locale/lang/en-US.js

@@ -0,0 +1,68 @@
+export default {
+  confirm: 'Confirm',
+  cancel: 'Cancel',
+  save: 'Save',
+  complete: 'Complete',
+  vanAddressEdit: {
+    areaTitle: 'Area',
+    areaWrong: 'Please select the correct receiving area',
+    areaEmpty: 'Please select a receiving area',
+    nameEmpty: 'Name can not be empty',
+    nameOverlimit: 'Name length exceeds limit',
+    telWrong: 'Wrong format of phone number',
+    addressOverlimit: 'The length of the address can not exceed 200 characters',
+    addressEmpty: 'Address can not be empty',
+    postalEmpty: 'Wrong postal code',
+    defaultAddress: 'Set as the default address',
+    deleteAddress: 'Delete the address',
+    confirmDelete: 'Are you sure you want to delete this address?',
+    label: {
+      name: 'Receiver',
+      tel: 'Phone',
+      postal: 'Postal'
+    },
+    placeholder: {
+      name: 'Receiver name',
+      tel: 'Phone',
+      postal: 'Postal code (optional)',
+      province: 'Province',
+      city: 'City',
+      county: 'County'
+    }
+  },
+  vanAddressEditDetail: {
+    label: {
+      address: 'Address'
+    },
+    placeholder: {
+      address: 'Address'
+    }
+  },
+  vanContactCard: {
+    name: 'Name',
+    tel: 'Phone',
+    addText: 'Add contact info'
+  },
+  vanContactList: {
+    name: 'Name',
+    tel: 'Phone',
+    addText: 'Add new contact'
+  },
+  vanContactEdit: {
+    name: 'Name',
+    namePlaceholder: 'Name',
+    nameEmpty: 'Name can not be empty',
+    nameOverlimit: 'Name length exceeds limit',
+    tel: 'Phone',
+    telPlaceholder: 'Phone',
+    telInvalid: 'Malformed phone number',
+    save: 'Save',
+    delete: 'Delete',
+    confirmDelete: 'Are you sure you want to delete this contact?'
+  },
+  vanPullRefresh: {
+    pullingText: 'Pull to refresh...',
+    loosingText: 'Loose to refresh...',
+    loadingText: 'Loading...'
+  }
+};