This version treats all Int types (Int8, UInt32 etc) as SQLite base values, i.e. they can be used in a schema. Also adds support for Float.
The Bool type can now process TEXT columns in a limited way (but always writes as Int64). It'll match textual bools using the first character (Yes, No, True, False, 0, 1 etc).
Finally, when using a RawRepresentable w/ an unmapped stored value, a proper Error is thrown (vs crashing in a forced unwrap).