v2.1.0

• Add World feature (001) (#14)
• Add Wikidata QID coverage for all remaining features
  • Latin America and the Caribbean (419)
  • Australia and New Zealand (053)
  • Ceuta and Melilla (EA)
• Add aliases
  • "Australasia" (053)
  • "Macao" (MO)
• Add missing strict arguments to function headers in the API reference