psm3mkv v0.2

This version provides additional functionality to the calculation of restricted mean durations in calc_allrmds. These estimates may now be constrained by a lifetable (see calc_ltsurv) and discounting may now be applied. A vignette describing how to use this functionality is provided: vignette("background-mortality").

There are also some changes to _pkgdown.yml to avoid the theming changes imposed in the 0.6.0 release of bslib 0.6.0, with thanks to @nanxstats.