A big thanks goes out to [Pavel Kazhavets](https://github.com/pavel-kazhavets) for contributing the fix for enabling AWS IAM roles for S3 bucket cookbook storage. IAM user keys are no longer required!

## Enhancements

- add support for S3 storage using IAM roles [#1747](https://github.com/chef/supermarket/pull/1747) ([pavel-kazhavets](https://github.com/pavel-kazhavets))