JRuby 9.3.1.0 now available

Change effective on 13 October 2021

The Ruby stack now supports JRuby 9.3.1.0. To use this release, add the following code to your Gemfile:

ruby '2.6.8', :engine => 'jruby', :engine_version => '9.3.1.0'

The JRuby release notes can be found on the JRuby website.