Bumps [class-transformer](https://github.com/typestack/class-transformer) from 0.2.3 to 0.3.1.
- [Release notes](https://github.com/typestack/class-transformer/releases)
- [Changelog](https://github.com/typestack/class-transformer/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/typestack/class-transformer/compare/v0.2.3...v0.3.1

)

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