From [XLSForm spec](https://xlsform.org/en/#range), the Range question type by default should start at `0` and not `1`. pyxform default has "start" set to `1`: https://github.com/XLSForm/pyxform/blob/8288ba5bbf0a438c993cc7c9e01cd1a0831f5513/pyxform/xls2json.py#L160