print_speed property not supported

[meiragoldstone]

    const lobLetter = new LetterEditable({
      file: pdfUrl,
      color: true,
      use_type: LtrUseType.Operational,
      to: toAddress,
      from: fromAddress,
      print_speed: 'rapid',
    });

The value print_speed: 'rapid', is ignored. Looking at the generated docs, it doesn't look like it's a property on LetterEditable. This is a correct value though and is in the LOB docs.

Please update the sdk to include this in the constructor and settings so that we can use this important property.