`author`, `contributors` fields in `package.json`

[ctmbl]

Discussed in #52

^{Originally posted by ctmbl November 28, 2022}
started here

@atxr

Aha I'm totally fine about being the author of this repo, even if it's the whole club

Actually I was suggesting the opposite: as more contributors will add their work to the repo we could add their name to the contributor field as suggested by the documentation

[amtoine]

👍