Add ORCID ID to the PubMed export plugin

[jonasraoni]

Describe the bug
The authors might have ORCID IDs assigned to them, but we're not exporting them at the PubMed plugin.
We might follow the integration receipt available here: https://info.orcid.org/orcid-ids-and-the-nlm-dtd-how-does-it-work/

What application are you using?
OJS 3.3

[jonasraoni]

@ewhanson could you please review the linked micro-PRs (pre-warning to decrease the stress haha)?

[ewhanson]

Hey @jonasraoni, happy to have a look. I'm seeing some conflicting information about whether or not the URL would be acceptable based on various DTDs. I'll reach out to ORCID to confirm.

[jonasraoni]

Great, if you have easy access to them that will simplify my life haha.
AFAICS, they expect the ID just with the numbers (so I'll have to do an extra update anyway)

[asmecher]

@jonasraoni and @ewhanson, I'd like to wrap up 3.3.0-x builds in the next week or so; this is non-criticial so I'll include it if it's ready, but otherwise will defer.

[jonasraoni]

Okay! FYI this is a sponsored task.
I'm just waiting for a feedback from @ewhanson. On the description link and on Google I found some samples using just the ID, without the URL part, but an official confirmation is always welcome.