What's Changed
* Add copyright for OSS by george-zubrienko in https://github.com/SneaksAndData/proteus/pull/240
* Add black by george-zubrienko in https://github.com/SneaksAndData/proteus/pull/241
* Add datadog ServiceException to the list of retryable exceptions by george-zubrienko in https://github.com/SneaksAndData/proteus/pull/243
**Full Changelog**: https://github.com/SneaksAndData/proteus/compare/v1.3.8...v1.3.9