Changelog
- 4e20b45 Postgres 16: read new field from pg_replication_slots.
- eb91608 Postgres 16: read new field from pg_stat_user_indexes.
- c5f98e2 Postgres 16: read new fields from pg_stat_user_tables.
- d6159e2 Postgres 16 support.
Built with: go version go1.21.1 linux/amd64