Hi Josh,
Thank you !
The readme explain well how to proceed step by step. To summarize you should simply extract all your native libs in src/main/resources folder of each target platform and then run the usual mvn install to get them all.
I should warn you that I noticed a platform selection issue with macOS M1 builds (you will find a ticket about it on the GitHub repo). Feel free to mention other issue on GitHub.
Following Sebastien’s comment, I think this should be integrated into Kitware CI to consistently build all upcoming version : the 9.1 build come from compilations I did separately on several OS and I would not like to this twice 