Incompatibility with recent update in Signify-TS

[nkongsuwan]

There are recent changes in Signify-TS that breaks the current implementation of qvi-ts.

• client.credentials().issue() now requires an object as an input.

const credRes = await client1.credentials().issue({
        issuerName: 'issuerName',
        registryId: regk,
        schemaId: SCHEMA_SAID,
        data: vcdata,
        recipient: holder,
        datetime: TIME,
    });

• In IssueCredentialArgs of Signify-TS, data, rules, and source have type Record<string, unknown>, which cannot be automatically converted from the class objects defined in this project.