feat: implement persist.BatchAdapter interface (#283)

feat: upgrade Casbin to v3.8.1 (#280)

feat: add PostgreSQL example to README (#279)

feat: disable GORM slow SQL log output

feat: add new transactional adapter (#273)

feat: update go.mod and go.sum (#272)

feat: support isolated nested transactions (#271)

feat: add transaction support for nested and singular operations (#269)

feat: update dbresolver dependency to v1.6.0 (#265)

feat: upgrade casbin dependency to v2.100.0