Updated to work with elm 0.18

[richardfergie]

I have updated the package to work with elm 0.18

• infix operators don't seem to work any more so replaced Random.andThen with |> Random.andThen
• The [a..b] syntax for creating lists has been replaced with List.range

I've also updated elm-package.json but I've left the version number unchanged - I don't know what this would need to be changed to or if it needs changing at all

[harrysarson]

I was wondering the status of this one? elm 19 has now been released to so this library is now a couple of versions out of date.