* Remove the 1000 max_width rule in editorconfig which is obsolete since
prettier 2.3.2 has fixed the key-wrapping problem.
* Let prettier run on yaml files (notably modele-social, but not the translation
files).
* Simplify editorconfig file.
* Let editorconfig trim trailing whitespaces in yaml files, but ignore locale
yaml files.
* Allow prettier on publicodes.
Jalil Arfaoui
Johan Girod
Alexandre Hajjar