Depricated code in lilypond 2.24

[jpwhale]

Thank you for a fantabulous library!

I'm having some problems with LilyPond 2.24. Here are the errors produced when rendering the example files provided in the project.

minimal_log.txt
modulation-func_log.txt
modulation-scale_log.txt
cadence-scale_log.txt
cadenca-func_log.txt
sn967_log.txt

I don't mind using a previous version of lilypond, but I think this excellent library should be available for new users and users who need the new functions/fixes in the newest version.