Change the value of warningAsError in order to prevent the interpretation of warning due to none CRAN package install

Add install of all package dependencies for job .R-check-documentation-is-uptodate because devtools::document() require them (#13)

Many improvments

See merge request !4

- remove suggest package todor and magick in test packages
- add install of devtools before citoolsr if it is not already installed

in order to not block the CI during #9 resolution