Log Message:
textproc/libxlsxwriter: Update to 1.1.5

Changes:
 - Added support for writing a workbook to a memory buffer instead of
   to a file via the output_buffer parameter of workbook_new_opt().
 - Add support for using in-memory data instead of temporary files on
   systems where fmemopen() and open_memstream() are supported. This
   requires the USE_MEM_FILE compilation option.