rust 1.4.0

New features

ru() and ru_rcpp() have an additional argument mode that allows the user to specify the known mode of the input function logf instead of finding it using numerical methods.

An extra example has been added to ru(), involving different Box-Cox transformation parameters for different component variables.
The list object returned from the function ru() has an extra component named trans_fn. This is an R function that performs the inverse transformation from the transformed variable $\rho$, on which the generalised ratio-of-uniforms method is performed, back to the original variable $\theta$.
The documentation of the functions ru() and ru_rcpp() now note that if the argument n = 0 is passed then the ratio-of-uniforms bounding box is returned but no simulation is performed. This may be useful if the bounding box itself is of interest.
In the description of the argument logf to ru() and ru_rcpp() it is advised that logf = should be provided explicitly to avoid the potential for argument matching problems.
In plot.ru() the arguments xlabs and ylabs have been super-seeded by an argument var_names, which can be used to provide variable names for use as axis labels.
Improvements to the package manual.
Activated 3rd edition of the testthat package
WARNINGs in the CRAN package check results, like "init.c:60:47: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes] extern SEXP _revdbayes_RcppExport_registerCCallable();" have been avoided.