Pub-date attributes added as per JATS update

<pub-date publication-format="electronic" date-type="pub">

For PoA would we change
date-type="pub" to "preprint" to distinguish between versions?
ISSN updates to reflect JATS

<issn pub-type="epub">2050-084X</issn>
<issn publication-format="electronic">2050-084X</issn>
Datasets

Updated tagging, but requires consideration and is not set. This is what can be done with JATS - is a related "article" not "object" as Datasets should be given the prominence of an article level and not object level. However, outcomes of the data citation group may have something better to suggest
License-p added  content-type="CCBY"