Bump xlsxwriter from 1.2.8 to 1.3.7 (#108)
Bump xlsxwriter from 1.2.8 to 1.3.7 (#108)

Bumps [xlsxwriter](https://github.com/jmcnamara/XlsxWriter) from 1.2.8 to 1.3.7.
- [Release notes](https://github.com/jmcnamara/XlsxWriter/releases)
- [Changelog](https://github.com/jmcnamara/XlsxWriter/blob/master/Changes)
- [Commits](https://github.com/jmcnamara/XlsxWriter/compare/RELEASE_1.2.8...RELEASE_1.3.7)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
kz26/PyExcelerate