* Implement fmt.Stringer with format.ID
Signed-off-by: Dan Luhring <dan+github@luhrings.com>
* Add failing test for formats processing empty SBOMs
Signed-off-by: Dan Luhring <dan+github@luhrings.com>
* Account for nil SPDX document during Syft model conversion
Signed-off-by: Dan Luhring <dan+github@luhrings.com>