refactor(Radio): 修改 bind:tap 为 mut-bind:tap

Author: juzi214032

src/radio/index.wxml

@@ -1,9 +1,9 @@
-<view bind:tap="onRadioChangeTap" 
+<view mut-bind:tap="onRadioChangeTap"
       class="label label-{{placement}} {{disabled?'label-disabled l-disabled-class':'l-class'}}">
         <view class="radio"
               style="color:{{checked?selectColor:(disabled?disabledColor:color)}};font-size:{{size}}">
             <slot wx:if="{{custom}}" name="icon"/>
             <view wx:else class="iconfont {{checked?'icon-select':'icon-unselect'}}"></view>
         </view>
         <slot/>
-</view>
+</view>