Add word boundary at beginning and end of all query language keywords…

… in query lexer (#331)

Support passing in a connection string for postgres databases (#325)

Make `DatastoreConfig` an interface (#324)

Allow object-type updates with an empty relations block (#319)

Allow creation of object-types with an empty relations block (#318)

Add `'Warrant-Token: latest'` header to query calls in `query-policy.…

…json` test suite (#316)

Add policy support to query endpoint (#315)

Fix `ResultSet` `Intersect` method (#313)

Optimize `ResultSet.Intersect` method (#312)

Update query cursor to include relation + fix implicit result logic (#…

…311)