chore: 迁移 tabs iconfont

components/tabs/demo/icon.md

@@ -9,11 +9,12 @@
 ````jsx
 var Tabs = antd.Tabs;
 var TabPane = Tabs.TabPane;
+var Icon = antd.Icon;
 
 var tabContent = [
-  <span><i className="anticon anticon-apple"></i>选项卡一</span>,
+  <span><Icon type="apple" />选项卡一</span>,
-  <span><i className="anticon anticon-android"></i>选项卡二</span>,
+  <span><Icon type="android" />选项卡二</span>,
-  <span><i className="anticon anticon-lock"></i>选项卡三</span>,
+  <span><Icon type="lock" />选项卡三</span>,
 ];
 
 React.render(