Add support to new AWS Lambda Runtime nodejs20.x

[MikeAtJulaya]

Hello 👋🏼

Actually types reject new runtime version:

Cannot load "serverless.ts": Initialization error: TSError: ⨯ Unable to compile TypeScript:
serverless.ts:14:5 - error TS2820: Type '"nodejs20.x"' is not assignable to type 'AwsLambdaRuntime | undefined'. Did you mean '"nodejs12.x"'?

In Serverless Framework, this runtime is available since v3.37.0.

It will be great to support this new one.

[C4n4rd0]

Let's also support nodejs22.x. But, is this project still maintained?

[codan84]

Certainly doesn't look like it's maintained. However, TS is supported out-of-the-box with Serverless now.