Previousy it was possible to define storage for ints and uints which
whose bit size was not divisible by 8. This was both broken, and is not
intended as a supported feature of Stylus. This has been changed into a
compile-time error to avoid using these broken types.
This fixes issue C-01 from the OpenZeppelin 0.7.0 audit.
Checklist
[ ] I have documented these changes where necessary.
[ ] I have read the DCO and ensured that these changes comply.
Description
Checklist