performance 0.10.5

Changes to functions

• More informative message for test_*() functions that "nesting" only refers
  to fixed effects parameters and currently ignores random effects when detecting
  nested models.

• check_outliers() for "ICS" method is now more stable and less likely to
  fail.

• check_convergence() now works for parsnip _glm models.

Bug fixes

• check_collinearity() did not work for hurdle- or zero-inflated models of
  package pscl when model had no explicitly defined formula for the
  zero-inflation model.