message: Add initialMessages to deltaConnection details
diff: @@ -44,6 +44,7 @@ export class DeltaConnection extends EventEmitter {
  this._details = {
  clientId: connection.clientId,
  existing: connection.existing,
  + initialMessages: connection.initialMessages,
  parentBranch: connection.parentBranch,
  user: connection.user,
  };
  