Bump structopt from 0.2.12 to 0.2.13
Bump structopt from 0.2.12 to 0.2.13

Bumps [structopt](https://github.com/TeXitoi/structopt) from 0.2.12 to 0.2.13.
- [Release notes](https://github.com/TeXitoi/structopt/releases)
- [Changelog](https://github.com/TeXitoi/structopt/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TeXitoi/structopt/compare/v0.2.12...v0.2.13)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
yasuyuky/ghteam-auth,yasuyuky/ghteam-auth