Default behavior for `remark-lint-linebreak-style`

remark-lint-linebreak-style breaks down when one explicitly sets the option to consistent, as L74 in https://github.com/remarkjs/remark-lint/blob/master/packages/remark-lint-linebreak-style/index.js only checks whether preferred is truthy. In other rules, you have used the following pattern at the beginning of the function body:

preferred = typeof preferred !== 'string' || preferred === 'consistent' ? null : preferred;

Alternatively, one could explicitly check for whether preferred is equal to unix or windows in L74.

[wooorm]

@kgryte @Planeshifter Sorry it took so long! 😬 Finally released!

[wooorm]

Sweet, thanks Philipp!