rhub v1.1.2

• Replace platform parameter with platforms in check() (#497).

• Update shortcut for Mac OS platform (@echasnovski, #393)

• cran_summary() now works even if there is a NOTE/WARNING/ERROR in one
  platform and nothing on other platforms (@fabian-s, #259).

• Check results have now a get_ids() method, to easily query the id(s)
  of the check.