datetime.now doesn't respect timezones

[AlecRosenbaum]

FreezeTime doesn't respect timezones in datetime.datetime.now.

See the below failing test case:

def test_freezefrog_now_no_tz():
    assert datetime.datetime.now(pytz.utc).tzinfo == pytz.utc

    with freezefrog.FreezeTime(
        datetime.datetime.now(), tz_delta=datetime.timedelta(seconds=0)
    ):
        assert datetime.datetime.now(pytz.utc).tzinfo == pytz.utc
        # fails

Conversely, if it's frozen to a tz-aware datetime then an aware datetime is always returned:

def test_freezefrog_now_tz():
    assert datetime.datetime.now().tzinfo is None

    with freezefrog.FreezeTime(
        datetime.datetime.now(pytz.utc), tz_delta=datetime.timedelta(seconds=0)
    ):
        assert datetime.datetime.now(pytz.utc).tzinfo is None
        # fails

[AlecRosenbaum]

I'm still being impacted by this issue. In the mean time I've been using the (arguably harmful) utcnow() function instead of now(..) in application code when I run into issues.