Results are inconsistent, particularly between Scala 2.12 and 2.13

[kwalcock]

I think this has to do with this kind of warning that is found in the output of EvaluatorTest. The order of the parses comes out differently on consecutive runs (of different Scala versions) and a different winner may be chosen depending on that order.

WARNING: Expected no more than 2 parses for "el 25 de febrero", found:
  FindLater(Present,Map(MonthOfYear -> 2, DayOfMonth -> 25))
  FindEnclosed(FindLater(Present,Map(MonthOfYear -> 2)),Map(DayOfMonth -> 25))
  FindEnclosed(FindAtOrEarlier(Present,Map(MonthOfYear -> 2)),Map(DayOfMonth -> 25))
  FindAtOrEarlier(Present,Map(MonthOfYear -> 2, DayOfMonth -> 25))