Create .prettierrc

[tordans]

Solves #333.

Adds a config so users of https://prettier.io/ use the same formatting that does not change too much.

[tyrasd]

Are you sure this works? As far as I can see, prettier is only meant to format javascript code and doesn't do anything with .json files, which is what we would need here. See prettier/prettier#322 (comment). Am I overlooking something here? //edit: OK, it seems that ticket was a bit outdated. Ignore this – prettier also works fine for json files.

What we could (also) do is to add a .editorconfig file to define indentation and newline properties. Something like this should work.

root = true

[*]
charset = utf-8
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true

[**.json]
indent_style = space
indent_size = 4

[{package.json,.package-lock.json}]
indent_style = space
indent_size = 2