Feature Request: JSON schema on JSON output

[mcombuechen]

The CycloneDX JS lib adds a $schema field to the JSON output, linking to the respective JSON schema definition file at cyclonedx.org. It would be nice to also get this on the output from this library.

Example

{
  "$schema": "http://cyclonedx.org/schema/bom-1.4.schema.json",
  "bomFormat": "CycloneDX",
  "specVersion": "1.4",
  "version": 1,
  ...
}

[nscuro]

Implemented in #80, thanks @mcombuechen!