multiple proof array not handled

[troyronda]

https://github.com/w3c-ccg/vc-examples/blob/master/test-suite/fixtures/verifiable-credentials/api.neo-flow.com--CertifiedMillTestReport.json

      Array [
    -   "proof",
    +   Object {
    +     "check": "proof",
    +     "error": "proof validation error : decode new credential: check embedded proof: expecting [string]interface{}",
    +   },
      ]

[troyronda]

https://github.com/hyperledger/aries-framework-go/issues/1645