Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Zhenghua Nie <zhenghua.nie@gmail.com>’
  
  New maintainer:
    Zhenghua Nie <zhenghua.nie@gmail.com>
  Old maintainer(s):
    John Fox <jfox@mcmaster.ca>

No changes to worse in reverse depends.