enable bagging with lightgbm

[simonpcouch]

PR 2/2 to close #30, PR 1/2 is tidymodels/parsnip#768. More discussion in the PRed docs there.

Will draft as PR and we can come back to this after conf. :)

With these changes:

library(tidymodels)
library(bonsai)

data(penguins, package = "modeldata")

bt <-
  boost_tree(sample_size = tune()) %>%
  set_engine(engine = "lightgbm") %>%
  set_mode(mode = "classification")

grid <-
  tune_grid(
    bt,
    species ~ flipper_length_mm + island,
    bootstraps(penguins)
  )

autoplot(grid)

^{Created on 2022-07-14 by the reprex package (v2.0.1)}

[github-actions]

This pull request has been automatically locked. If you believe you have found a related problem, please file a new issue (with a reprex: https://reprex.tidyverse.org) and link to this issue.