tune 1.1.2

• last_fit() now works with the 3-way validation split objects from rsample::initial_validation_split(). last_fit() and fit_best() now have a new argument add_validation_set to include or exclude the validation set in the dataset used to fit the model (#701).

• Disambiguates the verbose and verbose_iter control options to better align with documented functionality. The former controls logging for general progress updates, while the latter only does so for the Bayesian search process. (#682)