argparse v2.1.5

• add_argument now uses as.logical() logic to cast variables
  to logical values if type = "logical" and action = "store" or action = "append"
  instead of using Python's bool() logic (#39).

  • We throw an error if we would get an NA by coercion.
  • We no longer throw a warning when using type = "logical" and action = "store"
    suggesting users instead use action = "store_true" or action = "store_false".