0.12.15

As usual, see

• https://github.com/RcppCore/Rcpp/blob/master/inst/NEWS.Rd
• https://github.com/RcppCore/Rcpp/blob/master/ChangeLog
• http://dirk.eddelbuettel.com/blog/2018/01/20#rcpp_0.12.15
  for more details.

You can use the CRAN repo with the R package management tools for installation, and the RcppCore drat repo via drat::addRepo("RcppCore") to access pre-releases.