butcher 0.3.2

• Added butcher methods for mixOmics::pls(), mixOmics::spls(),
  and mixOmics::plsda() (#249).

• Added butcher methods for klaR::rda() and klaR::NaiveBayes() (#246).

• Added butcher methods for ipred::bagging() (#245).

• Added butcher methods for MASS::lda() and MASS::qda() (#244).

• Added butcher methods for survival::coxph() (#243).

• Added butcher methods for xrf::xrf() (#242).

• Added butcher methods for mda::fda() (#241).

• Added butcher methods for dbarts::bart() (#240).