refactor: update random number generation to use rand::make_rng() and upgrade rand to version 0.10

src/kde/multivariate.rs

@@ -5,7 +5,7 @@
 //! parameter independently, the multivariate KDE models the joint distribution
 //! to better capture correlations between parameters.
 
-use rand::Rng;
+use rand::{Rng, RngExt};
 
 use crate::error::{Error, Result};
 

src/kde/univariate.rs

@@ -3,7 +3,7 @@
 //! This module provides a Gaussian kernel density estimator used by the TPE
 //! sampler to model probability distributions over good and bad trial regions.
 
-use rand::Rng;
+use rand::{Rng, RngExt};
 
 use crate::error::{Error, Result};