Compatibility with older Java version

[Vampire]

Would it be possible to build the Monocle artifacts with / for older Java versions?
We for example use Java 17 as runtime, but with JavaFX 21.
But our component tests now using this cannot run on this combination as the Monocle artifacts are built with class file version of Java 21.
So we either have to test with the JavaFX 17 monocole artifacts or with Java 21, which both of course then do not match our target environment.