textproc/py-xlsxwriter: Update to 1.0.3.

- Added Excel 2010 data bar features such as solid fills and control over the
  display of negative values. See :ref:`working_with_conditional_formats` and
  :ref:`ex_cond_format`.
- Fixed :func:`set_column` parameter names to match docs and other methods.
  Note, this is a backward incompatible change.
- Fixed missing plotarea formatting in pie/doughnut charts.

(fhajny)