Linting markdown files according to default remark-lint configuration.
Files inside the `public` directory were not linted.
Signed-off-by: oupala <oupala@users.noreply.github.com>
This is a backport of #278 with the default value of `scope` changed to
`undefined`. This is thus a fully backward-compatible change.
Signed-off-by: Victor Berger <victor.berger@m4x.org>
