Improve Range usability

[mfelsche]

Current issues with collections.Range that hurt its usability:

• negative Ranges (where min > max) is only expressable for signed integers:

  // this is not possible, as the inc parameter is also U8
  Range[U8](10, 0, -1)

• The default inc should only be 1 if min <= max, otherwise it should be -1 to ensure that we iterate into the expected direction:

   // this should infer a default step of -1
  Range[U8](10, 0)
  
  // this should infer a default step of 1
  Range[U64](0, 10)

[EpicEric]

Solved by ponylang/ponyc#2350

[SeanTAllen]

Thanks @EpicEric!