Maintenance: Bump oauth2 from 2.0.2 to 2.0.3
Bumps [oauth2](https://github.com/oauth-xx/oauth2) from 2.0.2 to 2.0.3.
- [Release notes](https://github.com/oauth-xx/oauth2/releases)
- [Changelog](https://github.com/oauth-xx/oauth2/blob/master/CHANGELOG.md)
- [Commits](https://github.com/oauth-xx/oauth2/compare/v2.0.2...v2.0.3)