Log Message:
py-xlsxwriter: updated to 1.4.2

Release 1.4.2 - May 7 2021
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* Added support for GIF image files (and in Excel 365, animated GIF files).

Release 1.4.1 - May 6 2021
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* Added support for dynamic arrays and new Excel 365 functions like UNIQUE and
  FILTER. See :func:`write_dynamic_array_formula`,
  :ref:`formula_dynamic_arrays` and :ref:`ex_dynamic_arrays`.

* Added constructor option "use_future_functions" to enable newer Excel
  "future" functions in Formulas. See :ref:`formula_future`, and the
  :func:`Workbook` constructor.