Fixes for Pure 5.28.3

Fixes following the upgrade to 5.28.3

• change in DOI representation
• change to 'free' keyword representation

Also resolves SDG labels appearing as EPrint subjects.

Autumn 2022 update

Cumulative update covering https://github.com/digital-york/wrro-pure/milestone/1

What's Changed

• Testing20161116 in #1
• Don't send unpublished or in_prep date types by @jesusbagpuss in #2
• Map Riox funder details (fixes #7) by @jesusbagpuss in #10
• Dates - fixes #3 by @jesusbagpuss in #8
• Only map user-defined 'keywords'. by @jesusbagpuss in #14
• Map Preprint item type by @jesusbagpuss in #15

New Contributors

• @jesusbagpuss made their first contribution in #2

Full Changelog: https://github.com/digital-york/wrro-pure/commits/v1.1.0