cargo test now fails with changes made in rust 1.83

Running `cargo test` emits a new failure that was not present until Rust 1.83. I believe this is due to changes in how `missing_docs` is handled. https://releases.rs/docs/1.83.0/

```
error: missing documentation for the crate
--> tests/lib.rs:5:1
|
5 | / #![deny(missing_docs)]
6 | | use {
7 | | crate::{test_error, Json5Format},
8 | | json5format::*,
... |
1908 | | })
1909 | | }
| |_^
|
note: the lint level is defined here
--> tests/lib.rs:5:9
|
5 | #![deny(missing_docs)]
| ^^^^^^^^^^^^

error: could not compile `json5format` (test "lib") due to 1 previous error
```