cyclonedx packages fails to generate

[Tim-McDougall]

In the cyclonedx_parser.py file, when it saves the package metadata, it saves the key of the dictionary as a tuple: https://github.com/anthonyharrison/lib4sbom/blob/b7390b1a3c0124afb8856b4ea6a3fd33cda89919/lib4sbom/cyclonedx/cyclonedx_parser.py#L419

This is an invalid key when trying to export to json with the generator, and the dumps call will fail with an exception.

[anthonyharrison]

Have you got some sample code where it fails? A tuple is a valid key for a Python dictionary

[anthonyharrison]

Unable to reproduce without further information being provided.