fix(json-api-nestjs-sdk): export utils service

Author: klerick

libs/json-api-nestjs-sdk/src/index.ts

@@ -1,5 +1,6 @@
 export * from './lib/json-api-nestjs-sdk.module';
 export * from './lib/service/json-api-sdk/json-api-sdk.service';
+export * from './lib/service/json-api-utils/json-api-utils.service';
 export { EmptyArrayRelation } from './lib/utils';
 
 export * from './lib/init';