Cannot nest an array of string

[nimai]

Hello,

Thank you for this nice library, it's quite useful.
I'm facing an issue right now with the formatting of a nested array of strings. It's probably just a missing feature, but I really expected it to work. Maybe I'm doing something wrong?

This gives me an error:

await n.array(
            n.type({
                customerId: n.string('po.dis_code'),
                orderNumber: n.string('po.orderingporef', {id: true}),
                orderLines: n.array(
                    n.type({
                        lineId: n.string('pol.orderingreference', {id: true}),
                        price: n.number('po.unitprice'),
                        activationNumber: **n.array(n.string('s.code'))**
                    })
                )
            })
        ).withQuery(q)

Error: invalid structPropToColumnMap format - property 'id' must be either a string, a plain object or an array

and this doesn't:

await n.array(
            n.type({
                customerId: n.string('po.dis_code'),
                orderNumber: n.string('po.orderingporef', {id: true}),
                orderLines: n.array(
                    n.type({
                        lineId: n.string('pol.orderingreference', {id: true}),
                        price: n.number('po.unitprice'),
                        activationNumber: **n.array(n.type({a: n.string('s.code')}))**
                    })
                )
            })
        ).withQuery(q)

Anyway, it would be nice to be able to nest arrays of strings.

Regards