I have had a backlog of changes that I wanted to make to the iTunes patch. I finally took some time this weekend to work on those and release version 1.1. The major improvement in this version is the check for System Integrity Protection.
Take a look at this commit for more details about this round of changes. You can download the latest version on the project page.
Apple will be releasing macOS Sierra this coming Tuesday, September 20th. This also means that the rcd file will be replaced with the stock version so you will have to patch it again. I upgraded one of my computers and was able to verify that the patch still works as expected.