Recent update to 2.3.1 do not list exception exhaustively
After updating, I now have an error message : 
```
/home/rcaillaud/.nimble/pkgs/norm-2.3.1/norm/sqlite.nim(148, 103) template/generic instantiation from here
/home/rcaillaud/.nimble/pkgs/norm-2.3.1/norm/sqlite.nim(173, 6) Error: fromRow(obj, get row) can raise an unlisted exception: IOError
       Tip: 120 messages have been suppressed, use --verbose to show them.
```

This prevents me from compiling using latest devel compiler.

Using 2.3.0, I don't have this issue