rails--rails/activesupport/CHANGELOG.md

*   `HashWithIndifferentAccess#deep_transform_keys` now returns a `HashWithIndifferentAccess` instead of a `Hash`.

    *Nathaniel Woodthorpe*


Please check [6-1-stable](https://github.com/rails/rails/blob/6-1-stable/activesupport/CHANGELOG.md) for previous changes.