Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Carl Suster <carl.suster@sydney.edu.au>’
  
  New maintainer:
    Carl Suster <carl.suster@sydney.edu.au>
  Old maintainer(s):
    Carl Suster <Carl.Suster@health.nsw.gov.au>
  
  Suggests or Enhances not in mainstream repositories:
    rnaturalearthhires
  Availability using Additional_repositories specification:
    rnaturalearthhires   yes   http://packages.ropensci.org

No changes to worse in reverse depends.