Re-export `wasm-bindgen`

Posted in https://github.com/orhun/ratzilla/issues/39#issuecomment-2698523236

> Since `JsValue` is exported as an error form from wasm_bindgen, it would be nice to re-export wasm_bindgen as well, so I don't have to do the dependency dance with multiple versions of wasm_bindgen <.<

