Update README.md

[rcaneill]

I copied from:

• https://github.com/pyOpenSci/software-peer-review/blob/main/appendices/review-template.md?plain=1
• https://github.com/openjournals/joss-reviews/blob/master/.buffy/templates/reviewer_checklist.md?plain=1

[rcaneill]

@vadmbertr @lesommer I propose that we do suggestions on this PR on which boxes we want to keep. I’ll reorder them afterward

[rcaneill]

I guess it's still too many of them and we have to prioritize now?

Yes I agree. I removed the extra points so it may be easier to move forward now

[rcaneill]

The important main topics may be:

• general structure (having a readme, a licence, contributing guide, etc)
• tests
• doc

You see anything more?

[rcaneill]

@vadmbertr I updated and cleaned the checkboxes, what do you think?

[vadmbertr]

It's fine to me!