Fixes issues with timezone

[philolo1]

This pr should fix the issue with the timezones #36. Now all tests are passing.

I am not sure whether the logic is correct or we should rather change the tests.

[tertsdiepraam]

Interesting! I think the tests should be run with always the same dates and timezones as reference, so Local for tests is not quite right. Rather, it should be some random (but fixed) dates and timezones. So, I'd rather have Utc in the tests, because that's supposed to fail less in different timezones. Clearly, there's some work to be done to back up that claim though 😄

[tertsdiepraam]

Here's the culprit for at least one of them:

parse_datetime/src/lib.rs

Line 203 in ff0f99b

let time_now = Local::now().date_naive();

Is it just me or is that function a bit weird? It doesn't do anything with the date being passed in during parsing. It just offsets the duration at the end, but that's a strange use case isn't it?

Edit: We're not using it in coreutils either. So I'm not sure why it's there.

Edit 2: It comes from here: #2. @sylvestre what do you think, should we simplify this back to one function? I'm not sure I see the use case here. At least until we start taking the date into account for computing the actual offset like in https://github.com/uutils/parse_datetime/pull/28/files.

[sylvestre]

heu, not sure, sorry :)
maybe it can be removed? (at least, it needs to be rebased)

[philolo1]

I am closing this until we find a better solution / refactor it.