feat: use generic on userinfo

[Joabesv]

hi there, just adding to avoid an as Type, and generic is compatible with Object so it shouldn't break anything (as it already didn't)

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[Joabesv]

hi guys, any comments here?

[Uzlopak]

@Joabesv

Yeah, I checked it locally and it strange, that the Generic without default type is by default Object. Is this something new in typescript? I expected that we would get some type error, because we dont set the type in the tsd tests?

Please add a tsd test like this in index.test-d.ts at about line 286

expectType<{bla: string}>(await server.testOAuthName.userinfo<{bla: string}>(token.token.access_token));

[Uzlopak]

LGTM

@Eomm
PTAL

[mcollina]

lgtm

[Joabesv]

Thanks for the follow up on this!

[mcollina]

@Joabesv I'm so sorry, but these conflicts now. Can you rebase/fix them?