Fix PagingData minID test to use correct argument of minID

test/paging_data_test.dart

@@ -36,7 +36,7 @@ void main() {
 
     test('MinID only', () {
       expect(
-        PagingData(maxId: 10).toQueryParameters(),
+        PagingData(minId: 10).toQueryParameters(),
         equals('limit=50&min_id=10'),
       );
     });