Support for DateOnly

[EfimC-Work]

I am trying to use the QuerySql method to map an object with a DateOnly property and in the database it is a date column.

I get the following cast issue that it's an invalid cast. I think it would be great if this gets supported.

[jonwagner]

It shouldn't be too hard to add. Can you provide a minimal test case? Ideally something I can just plug into unit tests then go fix the appropriate code.