chore: adjust path of test utils (#4997)

src/tabbar/test/demo.spec.js

@@ -1,4 +1,4 @@
 import Demo from '../demo';
-import demoTest from '../../../test/demo-test';
+import { snapshotDemo } from '../../../test/demo';
 
-demoTest(Demo);
+snapshotDemo(Demo);

src/tabbar/test/index.spec.js

@@ -1,5 +1,5 @@
 import VueRouter from 'vue-router';
-import { mount, later } from '../../../test/utils';
+import { mount, later } from '../../../test';
 import Vue from 'vue';
 import Tabbar from '..';
 import TabbarItem from '../../tabbar-item';