Increment version number to 1.2.2
Increment version number to 1.2.1
Increment version number to 1.2.0
update cran comments
Increment version number to 1.1.4
Increment version number to 1.1.3
add skip on CRAN for discretize_xgboost
Increment version number to 1.1.1
shorten execution time for step_discretize_xgb()
add missing skip_on_cran()