There is no iTunes on Catalina. Unless you mean iTunes for Mojave, etc.? In that case, I don’t think there’ve been any substantive updates. I can’t recall, but there may have been a bug fix update.
iTunes got some kind of update yesterday on my Mojave, through a (developer's) security update.
I don't know what the update might have been, but my iTunes is version 12.9.5.5