SvelteKit Cookie Expiry

FIXED: https://github.com/sveltejs/kit/issues/4087

This repo demonstrates an issue with the Netlify Adapter for SvelteKit when setting expiry on cookies.

• See the deployed example - taken down, as the issue is fixed and merged.

The /feedme endpoints set a cookie called "flavor" with an expiry. On local environment, this works without issue, and you can observe the results with the browser's developer tools. When deployed to Netlify, the cookie is split at the date's comma, resulting in a session cookie that cannot be unset naturally.