review in the open

[maelle]

I like that this package means that a reviewer can make open the whole review process, but I can imagine reviewers not being at ease with their experiments being public, so maybe a sentence could be added about that somewhere? 1) one can create a private GitHub repo at the beginning (it's an option of usethis::use_github) if one has the correspondong GitHub subscription 2) one could mention the idea of pushing at the very end.

That said I think we should encourage the open reviewing, so the phrasing should be cautious. I just wouldn't like shy first-timer reviewers to be put off?