Juniper: Union with Boxed enum variants

[Guara92]

Hi,

Upgrading from 0.14 to 0.15 is giving me some problems with unions that have some boxed enum variant, i.e.:

#[derive(GraphQLUnion)]
pub enum GqlResult {
    Ok(Box<Data>),
    Err(Error),
}

the docs specifies that container types are supported but the compiler complains about a missing impl of the trait GraphQLObjectType for Box, I'm doing something wrong?

[tyranron]

Seems to be a major hole in type-level stuff 🙀

Will try to submit the PR shortly.

[LegNeato]

This is released to crates.io. Thanks for the report @Guara92 and for the PR @tyranron !