Exception when calling DateTime.astimezone

[mattmess1221]

When attempting to use tomlkit.items.DateTime.astimezone(), a TypeError is raised.

    date = date.astimezone()
TypeError: __new__() missing 2 required positional arguments: 'trivia' and 'raw'

The current workaround is to reinitialize the object using the datetime module.

date = datetime.combine(date.date(), date.time())
date = date.astimezone()

[mattmess1221]

I've looked at the source more closely, and I've determined this is caused because DateTime does not implement replace and astimezone. I believe this is an issue for the same reason add and sub need to be implemented.

I suggest an implementation similar to __add__ and __sub__ for astimezone and replace. replace() should also be implemented in Time and Date.

The following tests were used to test this solution.

import pytz

import tomlkit


def test_datetime_astimezone():
    # US/Pacific time zone
    assert tomlkit.datetime("2022-12-25 12:23:34-05:00").astimezone(pytz.timezone("US/Pacific")).as_string() == "2022-12-25T09:23:34-08:00"


def test_datetime_astimezone_noargs():
    # Use the local timezone
    tomlkit.datetime("2022-12-25 12:23:34-05:00").astimezone()


def test_datetime_replace():
    assert tomlkit.datetime("2022-12-25 12:23:34-05:00").replace(year=2021).as_string() == "2021-12-25T12:23:34-05:00"