chore: update Lambda Node.js to 20.x

[trivikr]

Noticed in: #961

Node.js 20.x is the latest version of Lambda https://aws.amazon.com/blogs/compute/node-js-20-x-runtime-now-available-in-aws-lambda/

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[kaiz-io]

The tests failed make sure that you can run yarn run test or npm run --if-present test and that cdk synth works.

[trivikr]

I'm not sure why the tests are failing. The yarn synth works locally for typescript/api-gateway-parallel-step-functions

Feel free to take over the PR, or close it.
The original goal for upgrading to Lambda Node.js 18.x is achieved, and this PR was just an additional update.

[kaiz-io]

So just fixed an issue that might have been affecting one error that you were getting. Currently the build is failing because in the project typescript/api-gateway-lambda-token-authorizer/ the test that is configured is failing because the snapshot is different.

Here is the command to run in the director to replicate the issue. npm run --if-present test

[github-actions]

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