Creator comment is missed in SPDX 2.3 to 3.0.1 conversion #387
Description
Creator comment (https://spdx.github.io/spdx-spec/v2.3/document-creation-information/#610-creator-comment-field) is lost during conversion of the SPDX 2.3 JSON doc to 3.0.1 (Spdx2to3Converter).