updates of dublic_core

[kjgarza]

Purpose

You uploaded the pre-final version I sent, please replace the PDF
on the page with the one attached

If you could add this additional text at https://schema.datacite.org/dc/:

On the occasion of the release of v4.4 of the DataCite Metadata Schema  
its Metadata Working
Group has updated the mapping to Dublin Core. This replaces the  
mapping in the Appendix of
the DataCite-MetadataKernel v2.1.

The mapping can be used to convert records described following version  
4.4 of the
DataCite Metadata Schema into records that comply with the Dublin Core  
Metadata Initiative
Schema.
Could you please add a link to the mapping document from the schema
page at https://schema.datacite.org/meta/kernel-4.4/ under
"Documentation" section, right below the v4.4 schema documentation?

closes: #98

Approach

Open Questions and Pre-Merge TODOs

Learning

Types of changes

• Bug fix (non-breaking change which fixes an issue)

• New feature (non-breaking change which adds functionality)

• Breaking change (fix or feature that would cause existing functionality to change)

Reviewer, please remember our guidelines:

• Be humble in the language and feedback you give, ask don't tell.
• Consider using positive language as opposed to neutral when offering feedback. This is to avoid the negative bias that can occur with neutral language appearing negative.
• Offer suggestions on how to improve code e.g. simplification or expanding clarity.
• Ensure you give reasons for the changes you are proposing.