[demo - vue] 修复错误

examples/vue/package.json

@@ -8,8 +8,8 @@
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
+    "classnames": "^2.2.6",
     "core-js": "^3.4.3",
-    "unique-classnames": "^1.0.6",
     "urtc-sdk": "latest",
     "vue": "^2.6.10"
   },

examples/vue/src/components/StreamInfo.vue

@@ -9,7 +9,7 @@
 </template>
 
 <script>
-import classnames from 'unique-classnames';
+import classnames from 'classnames';
 
 export default {
   name: 'StreamInfo',