Fix one more missing column variable type for pgbouncer 1.23 (#32)

* fix: fix pgbouncer_server view missing column

* chore: update changelog

* fix: fix pgbouncer_dns_zones view missing column

* fix: change column name reserve_pool to reserve_pool_size for show databases

* fix reserve_pool_size datatype in users

* fix: fix pool_size data type in users

* fix: fix data type for pgbouncer 1.23

Author: keithf4

sql/functions/pgbouncer_fdw_functions.sql

@@ -1891,7 +1891,7 @@ LOOP BEGIN
                 v_row.target_host AS pgbouncer_target_host
                 , x.name
                 , x.pool_size
-                , 0 AS reserve_pool_size
+                , '' AS reserve_pool_size
                 , x.pool_mode
                 , x.max_user_connections
                 , x.current_connections