Registry core - Major security updates

[simonoakesepimorphics]

[simonoakesepimorphics]

@kal The PR for this hasn't been merged and released yet.
See UKGovLD/registry-core#204

[kal]

@simonoakesepimorphics - should this ticket be in that repository instead then?

[simonoakesepimorphics]

@kal I don't think that will work since it's not an Epimorphics repo.