Problem with AWS GuardDuty Integration and Fortigate

Hi,
I've been recently looking into Fortinet's GuardDuty integration with AWS
https://github.com/fortinet/aws-lambda-guardduty

However it looks as if the lambda function is using a version of nodejs no longer supported by AWS
https://github.com/fortinet/aws-lambda-guardduty/issues/18

nodejs16 went end of life at around July this year

https://aws.amazon.com/blogs/developer/announcing-the-end-of-support-for-node-js-16-x-in-the-aws-sdk-for-javascript-v3/

According to the latest 7.6.0 docs it's still listed as working though
https://docs.fortinet.com/document/fortigate-public-cloud/7.6.0/aws-administration-guide/585081/creating-the-lambda-function

https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/attachments/63a2a759-3f9b-11ef-bfe5-fa163e15d75b/FortiOS_7.6_AWS_Administration_Guide.pdf

Last update was around 5 years ago in the repo, do you have any ideas on how to get this working?

If it needs redoing it might be an idea to do it in python instead due to the rapid changes nodejs has.