feat(quorum): 🎸 export model-type-guards to public API surface

These are handy utility functions that can narrow the types of
Web3SigningCredentialType instances.

Signed-off-by: Peter Somogyvari <peter.somogyvari@accenture.com>

packages/cactus-plugin-ledger-connector-quorum/src/main/typescript/public-api.ts

@@ -5,6 +5,8 @@ export {
   IPluginLedgerConnectorQuorumOptions,
 } from "./plugin-ledger-connector-quorum";
 
+export * from "./model-type-guards";
+
 export { PluginFactoryLedgerConnector } from "./plugin-factory-ledger-connector";
 
 import { PluginFactoryLedgerConnector } from "./plugin-factory-ledger-connector";