https://github.com/pillarjs/cookies/blob/master/lib/cookies.js#L74
https://github.com/pillarjs/cookies/blob/master/lib/cookies.js#L92
const cookies = new Cookies(req, res, ['key', 'keys']);
cookies.set('key', 'value'); // won't be signed
cookies.set('key', 'value', { maxAge: 100 }); // will be signed
not sure if we should make them all be signed or not be signed, and both will break people's code.
https://github.com/pillarjs/cookies/blob/master/lib/cookies.js#L74
https://github.com/pillarjs/cookies/blob/master/lib/cookies.js#L92
not sure if we should make them all be signed or not be signed, and both will break people's code.