According to https://www.ruby-lang.org/en/downloads/ even version 2.5.8 is
In security maintenance phase (will EOL soon!)
According to https://aws.amazon.com/about-aws/whats-new/2020/02/aws-lambda-supports-ruby-2-7/ AWS Lambda now supports 2.7
What work is necessary to bring Ruby On Jets up to 2.7?
Kind regards,
Tim