0.4.0

• Datacite 4.3 support:
  • Added the new elements and attributes introduced in DataCite 4.1, 4.2, and 4.3.
  • Updated sample DataCite XML documents to include the new examples introduced in DataCite 4.3.
  • Reading from XML still supports any version of the DataCite schema from 3.0 through 4.3.
  • Object mapping for some items was updated to use full objects instead of simple Strings
    when the DataCite schema introduced more complicated structure. E.g., because ContributorName
    can now include a nameType and an xml:lang, the simple "name" String in the Contributor object was
    replaced with a ContributorName object, accessed through Contributor.contributor_name, while
    Contributor.name is now a convenience method that allows access to the value as a String.
• These updates to the gem are fully backwards compatible with respect to the input/output XML, but some changes in the object model were required to support the more complex XML. So ruby code that worked with version 0.3.0 will require minor updates to use this version.