clear method

Implementation

@override
/// Clear all data from local storage
Future<void> clear() async {
  try {
    final db = await _initDB();
    final transaction = db.transaction(storeName, 'readwrite');
    final store = transaction.objectStore(storeName);
    store.clear();
  } on Exception catch (e) {
    debugPrint(e.toString());
  }
}