rsample 1.2.0

• The new initial_validation_split(), along with variants initial_validation_time_split() and group_initial_validation_split(), generates a three-way split of the data into training, validation, and test sets. With the new validation_set(), this can be turned into an rset object for tuning (#403, #446).

• validation_split(), validation_time_split(), and group_validation_split() have been soft-deprecated in favor of the new functions implementing a 3-way split (initial_validation_split(), initial_validation_time_split(), and group_initial_validation_split()) (#449).

• Functions which don't use the ellipsis ... now enforce empty dots (#429).

• make_splits() gained an example in the documentation (@AngelFelizR, #432).

• training(), testing(), analysis(), and assessment() are now S3 generics with methods for rsplit objects. Previously they manually required the input to be an rsplit object (#384).

• The int_*() functions are now S3 generics and have corresponding methods for class bootstraps (#435).

• The underlying mechanics of data splitting were changed so that Surv objects maintain their class. This change affects the row names of the resulting objects; they are reindexed from one instead of being a subset of the original row names (#443).

• rsample does not re-export gather() anymore (#451).