[improvement] update eslint rules (#2089)

packages/switch/demo/index.vue

@@ -5,11 +5,17 @@
     </demo-block>
 
     <demo-block :title="$t('disabled')">
-      <van-switch v-model="checked" disabled />
+      <van-switch
+        v-model="checked"
+        disabled
+      />
     </demo-block>
 
     <demo-block :title="$t('loading')">
-      <van-switch v-model="checked" loading />
+      <van-switch
+        v-model="checked"
+        loading
+      />
     </demo-block>
 
     <demo-block :title="$t('advancedUsage')">

packages/switch/index.vue

@@ -8,7 +8,10 @@
     @click="onClick"
   >
     <div :class="b('node')">
-      <loading v-if="loading" :class="b('loading')" />
+      <loading
+        v-if="loading"
+        :class="b('loading')"
+      />
     </div>
   </div>
 </template>