Prismabox passes `additionalProperties: false` to `Array`s

Follow up to #35.

`Type.Array` also has `additionalProperties: false` passed in. Unlike primitives, this one [looks intentional](https://github.com/m1212e/prismabox/blob/main/src/generators/wrappers/array.ts#L7). Does this behavior make sense? I'm happy to open a PR to fix that too if this makes sense.