Bad `.d.ts` emit for class expression on `module.exports

[DanielRosenwasser]

Repro

module.exports.answer = class C {
    foo = 10;
    bar;
}

Instructions

tsc --declaration --allowJS --outDir lib ./src/foo.js

Current

declare class C {
    foo: number;
    bar: any;
}
export {};

Expected

declare class C {
    foo: number;
    bar: any;
}
export { C as answer };

or

declare class C {
    foo: number;
    bar: any;
}
export var answer: typeof C;