performance 0.10.8

Changes

• Changed behaviour of check_predictions() for models from binomial family,
  to get comparable plots for different ways of outcome specification. Now,
  if the outcome is a proportion, or defined as matrix of trials and successes,
  the produced plots are the same (because the models should be the same, too).

Bug fixes

• Fixed CRAN check errors.

• Fixed issue with binned_residuals() for models with binomial family, where
  the outcome was a proportion.