Certification expiry date

[IskanderNovena]

I'd like to be able to add an expiry date to certifications that need to be renewed every x years/months. This will also help in showing the continuity of renewing certifications.

[thomasdavis]

Likely not a requirement for a large majority of users. Though it is a harmless addition to add an expiryDate so I think it should be considered.

[IskanderNovena]

Just noticed that this is a duplicate of #457

[schneidergithub]

I think this issue can also be closed. It can be added without being 'required'.

[thomasdavis]

Schema validation will fail if you try add it unless in meta, I think we can add this field, making as PR needed.

(also considering removing the idea that a resume is invalid if you include extra fields outside of meta, maybe throwing a warning.

[schneidergithub]

(also considering removing the idea that a resume is invalid if you include extra fields outside of meta, maybe throwing a warning.

I like this idea. I was thinking along the lines of a "core structure" and then have additions, such as Hobbies with inheritance / polymorphism / encapsulation.