v2.1.5

• Add $fitMergeFull, $fitMergInner, $fitMergeLeft,
  $fitMergeRight as a complement to $dataMergeFull,
  $dataMergInner, $dataMergeLeft, $dataMergeRight. The fit
  variants prefer columns in the fit dataset instead of the original
  dataset. This is useful for goodness of fit plots with censoring
  since the DV in the fit simulates values under the ipred/residual
  assumption and will give more appropriate goodness of fits,
  otherwise these values are the limit of whatever censoring is
  applied

• Moved the mu reference fix for the split mu referenced model here
  (from babelmixr2)

What's Changed

• Add simulation method by @mattfidler in #333
• 335 for $datamerge family prefer fit object instead of original data by @mattfidler in #336

Full Changelog: v2.1.4...v2.1.5