pandas 2.0 support

[ocefpaf]

Closes #299

In this PR:

• We are still relying on a private function but that code is the best there is :-/
• We are pinning to pandas >=2.0. Should be OK b/c we are patching the previous released erddapies to work with older pandas only (conda-forge), there is nothing we can do for PyPI;
• Re-added the tag regex that was accidentally removed;
• Added the dayfirst and yearfirst options to parse_dates. Only the default work when calling it internally but a user has the option to convert the date themselves this way.

[ocefpaf]

@gmaze I should've done this a long time ago :-)

Thanks for the ping in

this looks like a recurrent issue for erddapy (#128 #34 #240 )

[gmaze]

awesome, thanks for the quick fix !

[abkfenris]

What about extracting the import into a function and then tweaking execution on import errors?

Then we could probably revert the new pin.

def dang_datetimes(date_time: Union[datetime, str], dayfirst: bool=False, yearfirst: bool=False):
    try:
        from pandas import to_datetime

        return to_datetime(datetime, dayfirst=dayfirst, yearfirst=yearfalse).to_pydatetime()
    except ImportError:
        from pandas._libs.tslibs.parsing import parse_time_string

        return parse_time_string(date_time)[0]

[ocefpaf]

Then we could probably revert the new pin.

The new pin (>=1.5.3) is mostly b/c I was lazy and creating old envs to test but I'm 99% sure we can go as low as the old one (>=0.20.3) with the current code. I can get back to this in the afternoon and do more tests, hold on...

[gmaze]

thanks for the quick response to this issue @ocefpaf !

[ocefpaf]

The failures are due to a deprecation warning in xarray. I like the idea of making deprecation warnings errors in CIs but I couldn't figure out to limit those to erddapy only.

[abkfenris]

Maybe ignore:::xarray?

[ocefpaf]

Maybe ignore:::xarray?

That works but the config is awkward b/c we need to do it for every third party library. Maybe there is a way to ensure the rule is enforced only for the main lib.

[abkfenris]

error:::erddapy.* or similar?

[ocefpaf]

error:::erddapy.* or similar?

That did the trick! Thanks!!