Another possible serialization issue with the date transform

[Windvis]

In #6 I switched from using UTC dates to local dates because it fixed some issues. It turns out that it might have created others though 😅, more specifically this potentially breaks UTC dates created in negative timezones.

For example, if you create a date instance like this:

new Date('2022-10-20') the browser will assume the date is an UTC date.

From the MDN docs:

Date-only strings (e.g. "1970-01-01") are treated as UTC, while date-time strings (e.g. "1970-01-01T12:00") are treated as local.

The time will still be set to 0, but for the UTC time. So it will be something like this in Belgian time: 2022-10-20T02:00:00+02:00. This will still serialize properly with the current implementation.

The problem is if you execute the code in a "negative" timezone. For example if you create the same UTC date in a -4 timezone it will serialize the previous date again: 2022-10-19T20:00:00-04:00 -> 2022-10-19.

So this PR wasn't really correct either, but I'm not sure what the real solution is at this point. I'm not smart enough for timezones 😬.