The recently released jruby-maven-plugins 3.0.6 upgrades JRuby to 9.4.13.0. I suggest upgrading the JRuby that this extension depends on to 9.4.13.0.
To use the latest version of this extension and the latest version of jruby-maven-plugins at the same time, you need to download two versions of JRuby (9.4.5.0 & 9.4.13.0). It doesn't feel good, and it's not necessary.