As like #1789, I wonder `suggests` field should be allowed in standalone files. For example, https://github.com/r-lib/rlang/blob/3d48c13d052724cd5997a730ea41bc8e6991691b/R/standalone-cli.R includes `cli::`, so the `cli` package is needed in the `Suggests` filed of the DESCRIPTION file.