consider supporting tailors

[simonpcouch]

tailor is a new (though not yet on CRAN) package from tidymodels that implements objects specifying postprocessing steps (analogous to recipes for preprocessing). Once that package is on CRAN, I'd be happy to contribute some functionality to ensure tailors can predict in new sessions.

For the most part, they will "just work", but here's a bit more context on specifically the functionality we're interested in supporting here and in its linked issue: https://github.com/tidymodels/tailor/pull/64

The workflows package will also soon support adding tailors to workflows, so we might want to automatically bundle tailors when they're included in workflows.