[improvement] NoticeBar: update style (#1893)

packages/notice-bar/index.vue

@@ -11,7 +11,7 @@
     <div :class="b('wrap')" ref="wrap">
       <div
         ref="content"
-        :class="[b('content'), animationClass]"
+        :class="[b('content'), animationClass, { 'van-ellipsis': !scrollable }]"
         :style="contentStyle"
         @animationend="onAnimationEnd"
         @webkitAnimationEnd="onAnimationEnd"

packages/notice-bar/test/__snapshots__/demo.spec.js.snap

@@ -17,7 +17,7 @@ exports[`renders demo correctly 1`] = `
     <div class="van-notice-bar" style="color:undefined;background:undefined;">
       <!---->
       <div class="van-notice-bar__wrap">
-        <div class="van-notice-bar__content" style="padding-left:0;animation-delay:1s;animation-duration:0s;">足协杯战线连续第2年上演广州德比战，上赛季半决赛上恒大以两回合5-3的总比分淘汰富力。</div>
+        <div class="van-notice-bar__content van-ellipsis" style="padding-left:0;animation-delay:1s;animation-duration:0s;">足协杯战线连续第2年上演广州德比战，上赛季半决赛上恒大以两回合5-3的总比分淘汰富力。</div>
       </div>
       <!---->
     </div>