Changes in version 1.1 (2026-02-14)                   

Switched XGBoost params construction to xgb.params() to align with the R
migration guide and reduce deprecation risk.

Replaced alias params with “descriptive” names: eta→learning_rate,
gamma→min_split_loss, alpha→reg_alpha, lambda→reg_lambda.

Added seed inside the XGBoost params (not just set.seed()) for more
reproducible training/prediction.

In sampler(), preserved integer hyperparameters by generating integer
sequences for integer range (critical for past, max_depth).

Custom empirical function replacing edfun

                  Changes in version 1.0 (2025-03-24)                   

  - Initial CRAN submission.