`Vec<Vec<u8>>` conversion support missing

[jq-rs]

Hello! Thanks for this great crate! I tried to add Vec<Vec<u8>> under efficient bytes conversion but was unable to. Probably expected, would it be possible to add such support?

More detailed errors below:

... error[E0277]: the trait bound std::vec::Vec<std::vec::Vec<u8>>: std::convert::AsRef<[u8]> is not satisfied --> src/lib.rs:169:10	169	#[derive(Serialize, Deserialize, Debug, Clone)]	^^^^^^^^^ the trait std::convert::AsRef<[u8]> is not implemented for std::vec::Vec<std::vec::Vec<u8>>

= help: the following implementations were found:
          <std::vec::Vec<T> as std::convert::AsRef<[T]>>
          <std::vec::Vec<T> as std::convert::AsRef<std::vec::Vec<T>>>
= note: required by `serde_bytes::serialize`

error[E0277]: the trait bound std::vec::Vec<std::vec::Vec<u8>>: std::convert::From<std::vec::Vec<u8>> is not satisfied --> src/lib.rs:169:21	169	#[derive(Serialize, Deserialize, Debug, Clone)]	^^^^^^^^^^^ the trait std::convert::From<std::vec::Vec<u8>> is not implemented for std::vec::Vec<std::vec::Vec<u8>>

= help: the following implementations were found:
          <std::vec::Vec<u8> as std::convert::From<serde_bytes::ByteBuf>>
          <std::vec::Vec<T> as std::convert::From<std::collections::BinaryHeap<T>>>
          <std::vec::Vec<T> as std::convert::From<std::boxed::Box<[T]>>>
          <std::vec::Vec<u8> as std::convert::From<&'a str>>
        and 6 others
= note: required by `serde_bytes::deserialize`

...

[jq-rs]

I was able to workaround this with a separate struct definition. Closing.