[DISCUSSION] Deprecate support for CycloneDX schema version 1.0

[madpah]

As called out in #151 by @jkowalleck, 1.0 is old and very sparse compared to the more recent versions of the CycloneDX schema.

This ticket aims to collect any feedback from the community as to whether:

• This library is used to product BOMs in schema version 1.0
• Anyone has any strong feelings / requirements for us to keep supporting 1.0

[jkowalleck]

yes, this "feature" would cause breaking changes, as it cuts of an existing feature, and might remove existing classes/structures.

benefit: removing 1.0 capabilities removed complexity from the normalizers as no code-branching for is required, for features that exist from spec 1.1 on.