Delegate newtype EOC

[orthecreedence]

So, this one is probably controversial since it likely constitutes a breaking change. This is basically me scratching an itch with #161.

The scenario is explained in the linked issue, basically I want

Newtype3(Newtype2(Newtype1(ComplexType)))

where each of the Newtypes has #[rasn(delegate)] set in the derive macro to directly serialize as ComplexType. I added some tests with this PR as well.

If this doesn't get accepted I won't be hurt, but I would like to have some kind of way of doing the above because it's becoming very common for me to wrap some none-rasn-serializable value in another library with a Newtype(SomeForeignType) and I don't want to have to write a bunch of serialize/deserialize stuff by hand each time.

[XAMPPRocky]

Thank you for your PR! Looks good to me, you just need to resolve the merge conflict, and it should be good to merge.

So, this one is probably controversial since it likely constitutes a breaking change.

A breaking change on its own is not controversial, namely we haven't released a major version yet, and secondly the only thing a major version has to do is show why it's worth making the change, and I think this PR shows that makes the behaviour more intuitive.

[XAMPPRocky]

Thank you for your PR!

[orthecreedence]

Thanks for merging! This will save me a lot of effort.