Facter is missing the sys-filesystems gem

Hi,
facter uses the sys-filesystems gem to create the mountpoints facts. The gem isn't listed as a dependency in the gemspec file. facter also doesn't provide any error message if the gem is missing, it just doesn't provide the mounpoints fact. This leads to some unexpected behaviour. Facterdb got some factsets where those facts were missing which killed some CI pipelines that depend on it. Also bolt user mentioned that the fact is missing within bolt but works within Puppet AIO. Because Puppet AIO vendored sys-filesystems explicitly.

While I understand that sys-filesystems has native extensions and take slightly more time to install and requires a compiler, I still think that this behaviour is a bug and should be fixed by either replacing the gem with something else, or by adding it to the gemspec.