As requested, I just made a development release, 1.2.0-dev. There are quite a few planned features not yet implemented, and as such I don't consider this release "stable" (that is, boards I sell won't ship with this firmware unless you explicitly ask for it). What this release does provide is support for USB Power Delivery 3.0, bringing with it support for Programmable Power Supply APDOs (both making requests from them and pretty-printing them with get_source_cap). Also in this release is basic support for voltage ranges, allowing a fallback to common fixed supply PDOs when the preferred voltage is unavailable. The HV_Preferred flag does what it's supposed to, but the current is always constant when making requests from a range (no power or resistance modes yet).
EDIT: added a direct link to the firmware binary