0.3.0

• Added: UUID.parser(), which incrementally parses a hexadecimal UUID from a substring or collection of bytes.

• Added: Parser conformances for String, String.UnicodeScalarView, String.UTF8View, and [UInt8].

  These conformances can clean up a lot of StartsWith noise that can accumulate in string parsing. For example:

   let user = Int.parser()
  -  .skip(StartsWith(","))
  +  .skip(",")
     .take(Prefix { $0 != "," })
  -  .skip(StartsWith(","))
  +  .skip(",")
     .take(Bool.parser())