Version 0.3.0

• plu_ral() now accepts vectors for arguments n and pl.
  • e.g. plu_ral(c("word", "phrase"), n = c(1, 2)) returns c("word", "phrases").
• Fixed an error where the plural forms of "octopus" and "platypus" were mixed up.
• The plu_ral() argument n_fn is now deprecated.
• plu_stick() is now defunct.