OSDU-DD-Delivery-M18 (v0.21.0)

• Update to the M18 deliverables from OSDU Data Definitions

changed milestone to %M18 - Release 0.21

added Common Code IssueTask labels

assigned to @gehrmann

added to epic osdu/platform&8 (closed)

created branch 127-osdu-dd-delivery-m18-v0-21-0 to address this issue

mentioned in merge request !485 (merged)

mentioned in commit 88805ff1

closed with merge request !485 (merged)

marked the checklist item Update to the M18 deliverables from OSDU Data Definitions as completed

Thank you very much @chad for shepherding this to the master branch!