Change order of classes for LOO

[hfrick]

This should be first the more specific class, then the more general class (and it could just be an anonymous function inside of loo_cv()). We'll need to check revdeps when changing this one.

rsample/R/loo.R

Lines 35 to 38 in 4357e11

	change_class <- function(x) {
	class(x) <- c("rsplit", "loo_split")
	x
	}