Use Typescript for release-please-action

[pragmaticivan]

Motivation:

It would enforce type coming from release-please package.

Artifacts:

• https://github.com/actions/typescript-action (Possible inspiration)

[bcoe]

👍 seems like this would be a good decision. If we do so, I think we could use the standard TypeScript configuration that my team uses in libraries like this:

• use a similar tsconfig.
• use gts for linting.

[pragmaticivan]

That sounds good to me.