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

[ctmbl]

Discussed in https://github.com/iScsc/iscsc.fr/discussions/52

^{Originally posted by **ctmbl** November 28, 2022} *started [here](https://github.com/iScsc/iscsc.fr/pull/50#issuecomment-1323896622)* @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](https://docs.npmjs.com/cli/v6/configuring-npm/package-json#people-fields-author-contributors)

[amtoine]

:+1: