Support for Range Types

One of really nice features of PostgreSQL is range types:
tsrange — Range of timestamp without time zone
tstzrange — Range of timestamp with time zone
daterange — Range of date
int4range — Range of integer
int8range — Range of bigint
numrange — Range of numeric
https://www.postgresql.org/docs/current/rangetypes.html
would be nice to add support for them. I have time to work on this but it prob. requires a bit of discussion on TS types we would want to create for this @bartlomieju ?