Feature sbJson External Contact Identifiers

[jwaspin]

Closes #305 Closes #304 Closes #303

Changes

• Both reader and writer are restricted to "person" contact type
• sbJson reader looks for orcId and maps to externalIdentifiers[ { identifier: <orcId value>, namespace: "ORCID", description: "Open Researcher and Contributor Id" } ]
• sbJson writer looks for external identifier with namespace "ORCID" and maps the associated identifier to orcId
• Increment version to 2.18.5

Testing

http://23.23.4.125:3001/

[jwaspin]

Merged into https://github.com/adiwg/mdTranslator/pull/324