Here's the release notes: RC1: https://github.com/thoughtbot/bourbon/releases/tag/v4.0.0-rc.1 https://github.com/thoughtbot/bourbon/releases/tag/v4.0.0-rc...

Here's the release notes: RC1: https://github.com/thoughtbot/bourbon/releases/tag/v4.0.0-rc.1 https://github.com/thoughtbot/bourbon/releases/tag/v4.0.0-rc... RC2: https://github.com/thoughtbot/bourbon/releases/tag/v4.0.0-rc.2 https://github.com/thoughtbot/bourbon/releases/tag/v4.0.0-rc...