chore: adjust path of test utils (#4997)

src/area/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/area/test/index.spec.js

@@ -1,6 +1,6 @@
 import Area from '..';
 import areaList from '../demo/area.simple';
-import { mount, later, triggerDrag } from '../../../test/utils';
+import { mount, later, triggerDrag } from '../../../test';
 
 const firstOption = [
   { code: '110000', name: '北京市' },