feat!: update minimum required Node.js version to 20.19

[mutahhir]

Description

Since Nodejs 18 is no longer LTS, we're bumping the minimum version required for CDKTF to Node 20

Checklist

• I have updated the PR title to match CDKTF's style guide
• I have run the linter on my code locally
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation if applicable
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works if applicable
• New and existing unit tests pass locally with my changes

[DanielMSchmidt]

Why not use node 22 as minimum? I found a minimum with a minor version often frustrating as a user in the past.

[xiehan]

@DanielMSchmidt Among other things, there's no Node 22 runner for GitHub Actions yet, so anyone trying to use this in a GHA context (without Docker) is going to have issues if we require Node 22 as minimum.

I agree with using Node 20 here, but my personal take has always been to use the lowest value that's considered LTS which is 20.9.0 in this case, otherwise some folks are still going to run into compatibility issues.

[mutahhir]

I agree with using Node 20 here, but my personal take has always been to use the lowest value that's considered LTS which is 20.9.0 in this case, otherwise some folks are still going to run into compatibility issues.

I didn't realize that there were specific minor versions that were LTS. Where did you get this information? I just went for the latest minor version available, but that's useful to know

[mutahhir]

I think I got it. That's the release they marked it as LTS on their blog.