Support component packing

[tarrencev]

No description provided.

[neotheprogramist]

The error messages points the problem with deserialization.
While running test there appears such kinds of error messages:

• Supply failed to deserialize
• Uri failed to deserialize
  That suggested problem with felt252 deserialization

I was able to solve that by changing StorageLayoutFelt252 accordingly

impl StorageLayoutFelt252 of StorageLayout<felt252> {
    #[inline(always)]
    fn size() -> usize {
        2
    }

    #[inline(always)]
    fn layout(ref layout: Array<u8>) {
        layout.append(126);
        layout.append(126);
    }
}

Now instead of 66 failing tests, we have 58 failing.

The error messages changed as well, now they suggest deserialization problem with u256 and address

• ERC1155Balance failed to deseri(alize)
• ERC721Owner failed to deseriali(ze)
  But unfortunately, that seems to be (de)serialized well.
  I will try to find what causes that problem.