Insert always returns int. What about int64 id columns?

[zelenij]

This seems like a relatively small thing to fix. InsertAsync at the moment will always return int32, while Insert returns long. This will not work with tables, where the id happens to be int64.

[wswind]

https://github.com/DapperLib/Dapper.Contrib/issues/4#issuecomment-886451686