update package date

Update package date.

Update `cran-comments.md`.

Update `cran-comments.md`.

Update `cran-comments.md`.

Update `cran-comments.md`. The macOS builder

doesn't seem to have Pandoc installed (anymore?) and thus couldn't be used.

Minor enhancements in `cran-comments.md`.

Update `cran-comments.md` (now: win-builder)

`cran-comments.md`: Extend section "Downstream dependencies".

Update `cran-comments.md`.