v0.6.0: new cran release

• Removing previously deprecated functions (deprecated as of 0.4.0)
• Adding conditional evaluation for tests and the vignette (and the readme)
  for glmmTMB, in case it's not present / installable on a given system (as
  it's only a suggested package)

Minor:

• Removing call. = FALSE for errors and warnings
• adding future.seed = TRUE to future.apply::future_lapply call for better RNG
• Minor vignette and README copy edits