chore: prefer named exports (#8315)

* chore: prefer named exports

* chore: fix import

src/tab/test/index.legacy.js

@@ -1,4 +1,4 @@
-import Tabs from '../../tabs';
+import { Tabs } from '../../tabs';
 import { mount, later, triggerDrag, mockScrollTop } from '../../../test';
 
 function createWrapper(options = {}) {

src/tab/test/insert.spec.js

@@ -1,6 +1,6 @@
 import { mount, later } from '../../../test';
-import Tab from '..';
-import Tabs from '../../tabs';
+import { Tab } from '..';
+import { Tabs } from '../../tabs';
 
 test('should render correctly after inserting a tab', async () => {
   const wrapper = mount({