Explicitly define the exports from react-stately/tag (#4106)

* Explicitly define the exports from react-stately/tag

* remove extra newline

Author: LFDanLu

packages/@react-stately/tag/src/index.ts

@@ -10,4 +10,7 @@
  * governing permissions and limitations under the License.
  */
 
-export * from './useTagGroupState';
+export {useTagGroupState} from './useTagGroupState';
+
+export type {TagGroupState} from './useTagGroupState';
+export type {TagGroupProps} from '@react-types/tag';