test: demo snapshot uses enUS

src/contact-list/test/__snapshots__/demo.spec.js.snap

@@ -14,10 +14,10 @@ exports[`should render demo and match snapshot 1`] = `
           <i class="van-badge__wrapper van-icon van-icon-edit van-contact-list__edit">
           </i>
           <div class="van-cell__value van-cell__value--alone van-contact-list__item-value">
-            张三，13000000000
+            John Snow，13000000000
             <transition-stub class="van-contact-list__item-tag">
               <span class="van-tag van-tag--round van-tag--danger">
-                默认
+                default
               </span>
             </transition-stub>
           </div>
@@ -43,7 +43,7 @@ exports[`should render demo and match snapshot 1`] = `
           <i class="van-badge__wrapper van-icon van-icon-edit van-contact-list__edit">
           </i>
           <div class="van-cell__value van-cell__value--alone van-contact-list__item-value">
-            李四，1310000000
+            Ned Stark，1310000000
           </div>
           <div role="radio"
                class="van-radio"
@@ -65,7 +65,7 @@ exports[`should render demo and match snapshot 1`] = `
         >
           <div class="van-button__content">
             <span class="van-button__text">
-              新建联系人
+              Add new contact
             </span>
           </div>
         </button>