Add support for recursive types to Serializer

[mcfedr]

As correctly pointed out by @jvasseur, it's possible to have arrays of arrays.

#34 (comment)

Of course really we should check what normalizers are in the container, and only if ArrayNormalizer is active support this, and possibly be able to say what objects are deserializable,

[lookyman]

We can cross that bridge when we get to it (e.g. when someone runs into that and opens an issue 😊).

[mcfedr]

We can cross that bridge when we get to it (e.g. when someone runs into that and opens an issue 😊).

Yes, when I stated writing this i thought about it, and decided it was extra complication for very little gain...