fpp3 1.0.0

• Many more data sets added:
  • aus_births
  • aus_fertility
  • aus_inbound
  • aus_mortality
  • aus_migration
  • aus_outbound
  • aus_tobacco
  • aus_vehicle_sales
  • melb_walkers
  • nsw_offences
  • ny_childcare
  • otexts_views
• Dropped magrittr dependency