Updated the homebrew formula for 0.4.3.
Updated the homebrew formula for 0.4.3.

ngpestelos/ruby-install,PLOS/ruby-install,boone/ruby-install,FreedomBen/ruby-install,firstval/ruby-install,firstval/ruby-install,regularfry/ruby-install,postmodern/ruby-install,ngpestelos/ruby-install,boone/ruby-install,bascht/ruby-install,postmodern/ruby-install,FreedomBen/ruby-install,PLOS/ruby-install,regularfry/ruby-install,bascht/ruby-install