Support for verifiable credential Issuer object type

[sudeshrshetty]

Currently verification of credentials having issuer property as object type is failing.
Current version seems to supporting only id types.

Example: https://www.w3.org/TR/vc-data-model/#example-9-usage-of-issuer-expanded-property

[peacekeeper]

Hello @sudeshrshetty, the underlying library verifiable-credentials-java has been forked here: https://github.com/danubetech/verifiable-credentials-java. It's not perfect, but the issue you mention and a few others should have been fixed there.