Range type support

[hashhar]

I'm submitting a feature request

PostgreSQL's JDBC driver doesn't provide an implementation of the various range types.

Expected behaviour

pgjdbc should provide an implementation of Range types by implementing a class extending PGObject similar to how PGInterval or PGMoney are handled today.

[hashhar]

See debezium/debezium#1505 for an example use-case where such support might be useful and the following questions on StackOverflow for some ways people today try to workaround this: implementing custom types or depending on string parsing by PostgreSQL.

[maffe]

For int4range, int8range and numrange there is an implementation in #947. Personally I would like to have daterange support.