[bugfix] Button: tap triggered twice

packages/button/index.wxml

@@ -13,7 +13,7 @@
   send-message-path="{{ sendMessagePath }}"
   send-message-img="{{ sendMessageImg }}"
   show-message-card="{{ showMessageCard }}"
-  bindtap="onTap"
+  catch:tap="onTap"
   bindcontact="bindcontact"
   bindgetuserinfo="bindgetuserinfo"
   bindgetphonenumber="bindgetphonenumber"

packages/cell/index.js

@@ -36,7 +36,6 @@ Component({
 
   methods: {
     onTap() {
-      this.triggerEvent('tap');
       const { url } = this.data;
       if (url) {
         wx[this.data.linkType]({ url });

packages/switch/index.js

@@ -12,7 +12,7 @@ Component({
   },
 
   methods: {
-    onClick() {
+    onTap() {
       if (!this.data.disabled && !this.data.loading) {
         const checked = !this.data.checked;
         this.triggerEvent('input', checked);

packages/switch/index.wxml

@@ -1,7 +1,7 @@
 <view
   class="van-switch custom-class {{ checked ? 'van-switch--on' : '' }} {{ disabled ? 'van-switch--disabled' : '' }}"
   style="font-size: {{ size }};"
-  bind:tap="onClick"
+  bind:tap="onTap"
 >
   <view class="van-switch__node node-class">
     <van-loading wx:if="{{ loading }}" size="50%" custom-class="van-switch__loading" />