Add support for java.time.Instant mapping instead of java.util.Date in class mapping.
Add support for java.util.Optional<?> in Accessor interfaces.
I would suggest to instead of just providing support for Java 8 types, it'd be nice if you opened up the ColumnMapper interfaces and added a registration mechanism so that users can register their own column mappers. Integration with Spring's ConversionService would also be very welcomed.
(fixed in 2.2.0-rc2) provides a way to plug your own codecs into the mapper.
We plan to provide common extra codecs as a separate module in a future version, Java 8 dates will likely be part of it.