cmdstanr v0.2.2

Bug fixes

• Fixed bug with reading Stan CSV when grep used coloring by default (#364,#371)

• Depend on posterior v0.1.3 to avoid potential error in $summary(). (#383)

New features

• Added support for native execution on the macOS with the M1 ARM-based CPU. (#375)

• Added threading support via threads argument for $optimize() and $variational()
  (was already available via threads_per_chain for $sample()). (#369)