Version 1.3.0 of GrowthBook introduces significant enhancements, including increased flexibility for SQL data sources, feature revision history, and the launch of a new Flutter SDK. Among the key updates, users can now customize identifier types for randomization units, addressing the limitations of the previous hard-coded user identifiers and catering to various business needs. The update also introduces feature versioning, allowing for the review and publishing of changes with revision history and audit logs for tracking modifications. Additionally, the software now supports multiple experiment assignment queries from a single data source, simplifying the analysis process. The release of the Flutter SDK, contributed by Dhruvin Vainsh and Prince Bansal, marks a collaboration with Alippo, and the update includes various minor features and bug fixes, such as sorting goal metrics in experiments and adding SSO/SAML support for GrowthBook Cloud.