update processing of scancode output to work with the latest version

### Description

Starting with [nexB/scancode-toolkit/v31.0.0](https://github.com/nexB/scancode-toolkit/releases/tag/v31.0.1), the format of the output of scancode has changed. Any part of the service that processes scancode output will need to be updated to work with the new format.

Reference:

* [Calculating Definition Scores](https://github.com/clearlydefined/service/blob/master/docs/calculating-definition-scores.md)

Questions:

* Do past output formats need to also be supported? Use Case: After scancode output has been processed, does it remain in ClearlyDefined data and get reprocessed at a later date?

### Related Work

* https://github.com/clearlydefined/crawler/issues/502
* https://github.com/clearlydefined/crawler/issues/527