library: "module" renderStartup missing export

[ahabhgk]

// index.js
export const a = 1;
export const b = 2;

// rspack.config.js
module.exports = {
  entry: "./index.js`,
  mode: "development",
  devtool: false,
  output: {
    library: { type: "module" },
  }
  experiments: {
    outputModule: true
  },
}

Rspack's startup:

var __webpack_exports__ = __webpack_require__("./index.js");

webpack's startup

var __webpack_exports__a = __webpack_exports__.a;
var __webpack_exports__b = __webpack_exports__.b;
export { __webpack_exports__a as a, __webpack_exports__b as b };