update switch animation ease

components/menu/demo/theme.md

@@ -37,7 +37,7 @@ const Sider = React.createClass({
   render() {
     return (
       <div>
-        <Switch onChange={this.changeTheme} checkedChildren={<Icon type="eye" />} unCheckedChildren={<Icon type="eye-o" />} />
+        <Switch onChange={this.changeTheme} checkedChildren="Dark" unCheckedChildren="Light" />
         <br />
         <br />
         <Menu theme={this.state.theme}

components/switch/style/index.less

@@ -16,7 +16,7 @@
   border: 1px solid #ccc;
   background-color: #ccc;
   cursor: pointer;
-  transition: all @switch-duration @ease-in-out-circ;
+  transition: all @switch-duration;
   user-select: none;
 
   &-inner {
@@ -38,7 +38,7 @@
     background-color: #fff;
     content: " ";
     cursor: pointer;
-    transition: all @switch-duration @ease-in-out-circ, width @switch-duration @ease-in-out-circ;
+    transition: all @switch-duration, width @switch-duration;
   }
 
   &:active:after {