v5.1.2

rxode2 5.1.2

• geom_cens() / stat_cens() no longer emit "Ignoring unknown
  aesthetics" warnings when censoring aesthetics are mapped.
  Documentation corrected to describe the two supported lowercase
  forms: lower/upper (both required) or cens (with optional
  limit). The two forms cannot be mixed, lower and upper are
  now required together, and limit without cens is rejected
  rather than silently ignored.

• Checks for is.loaded() before loading a rxode2 model. This helps fix
  the m1 ODR issue shown in nlmixr2est.

• Moved dim.rxEt() here instead of in nlmixr2est