The latest milestone release has a dependency on version 3.0.6 of com.github.ben-manes.caffeine:caffeine. com.github.ben-manes.caffeine:caffeine requires a minimum of Java 11 starting with their 3.0.0 release.

Either this change should be reverted to use the latest 2.x release of com.github.ben-manes.caffeine:caffeine or the documentation should be updated to indicate that Java 8 is no longer the targeted minimum JRE version.