Fix/additional fields

[eum602]

Pull request type

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Link: N/A

What is the new behavior?

• Add PoE for emitted credentials.
• Add configuration variable PROOF_OF_EXISTENCE_MODE to set PoE mode:
  • DISABLED: Proof of existence is disabled, in the respose the field TxHash is set to null
  • STRICT: Proof of existence must strictly succeed otherwise the request throws and in the respose the field TxHash is set to null, otherwise that field will have a valid transaction hash
  • ENABLED_NOT_THROWABLE: If Proof of existence fails the request does not throw but in the respose the field TxHash is set to null, otherwise that field will have a valid transaction hash
• Updates verification registry to '0xF17Da8641771c0196318515b662b0C00132C4163' which by default uses
  didRegistry: 0x43dE0954a2c83A415d82b9F31705B969b5856003
• Considers certificate period fields (if defined) as the verifiable credential issuance/expiration dates
• Add additional fields
• validates mandatory and optional DDCCCoreDataSet fields
• Downgrades ethers to version 5.6.5 since it was needed to use GasModel Library.

Other information

N/A

Preview

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