De/serialize structs with named fields as array of values.
See: https://github.com/dtolnay/request-for-implementation/issues/3
```rust use serde_tuple::*;
pub struct Foo<'a> { bar: &'a str, baz: i32 }
let foo = Foo { bar: "Yes", baz: 22 }; let json = serdejson::tostring(&foo).unwrap(); println!("{}", &json); // # => ["Yes",22] ```
License: MIT