Bug: `invoke` panics with invalid return type when I expect a return type of `Vec<u8>` for `Bytes`

[krisbitney]

I expect a return type of Bytes, but invoke panics when using Vec<u8>. It is unclear what the return type should be.

let response = client.invoke::<Vec<u8>>(
        &uri,
        "bytesMethod",
        Some(&msgpack!({
            "arg": {
                "prop": "Argument Value".as_bytes().to_vec(),
            },
        })),
        None,
        None
    ).unwrap();

---- bytes_test_case stdout ----
URIS: []
thread 'bytes_test_case' panicked at 'called `Result::unwrap()` on an `Err` value: InvokeError("Failed to decode result: `invalid type: byte array, expected a sequence`")', packages/client/tests/tests-type-cases.rs:250:7