This project is abandoned, and unfortunately, there is not a unique fork. You'll have to choose a project, without a better guaranty that it's actively maintained. https://packagist.org/?query=liform&type=library
The compiler is case sensitive and fails if the option is given as written in the documentation.
Hello, I found this project very interesting, but the demo application is build upon an old, obsolete and insecure version of jQuery. In this PR, I removed the dependency to jQuery. The resulting page is almost identical the the previous version (tested on Firefox, Chrome and Edge). I also added a quick waveform visualization.