[FEATURE]: Add param substitution to `.toSQL()` function

### Feature hasn't been suggested before.

- [X] I have verified this feature I'm about to request hasn't been suggested before.

### Describe the enhancement you want to request

the `toSQL()` function currently returns an object with:

```
{
sql: `select "name", "address", "postcode"`,
params: [ 'John Doe', '221B Baker Street, London', 'NW1 6XE' ]
}
```

It would be good to add a parameter / options to the toSQL function to substitute the variables and return a raw SQL string that can be used in other DB clients / GUIs.