V2 is created as soon as breaking changes are introduced, as this package followes semantic versioning.

• fix all from https://github.com/CycloneDX/cyclonedx-javascript-library/milestone/4
• remove all @deprecated symbols -- remove deprecated symbols #752
• remove all @since 1.* annotation -- remove deprecated symbols #752
• publish a ReleaseCandidate(RC)
• test the RC by integrating it downstream