Bug#953740: Please package new upstream release of fonts-cantarell

[Jeremy Bicha <jeremy@bicha.net>]

afdko is now in Debian but that's only the first missing dependency.

The others are
https://github.com/daltonmaag/statmake
https://github.com/fonttools/skia-pathops

skia-pathops doesn't look easy since it probably requires skia to be
packaged. skia is embedded in Firefox, Thunderbird, Chromium,
LibreOffice, and Android, so I worry that skia will be a lot of work
to package and maintain.

As far as I can tell, no other distro (or even the GNOME release team)
tries to build Cantarell from source. That leaves us as the only
current distribution that is stuck on an old release.

Thanks,
Jeremy Bicha