It looks like "legacy" kernel extensions are going away in a future release of macOS. Users are now seeing this message dialog on macOS Catalina:

This project relies on this capability to make a "fake" USB HID device. It is unclear how that can be accomplished without it. Any thoughts?
I noticed this because my CCIDU2F project uses the kext from this project to allow NFC-only U2F tokens to be usable on desktops.
Any ideas?