Time entities should allow filtering past dates or future dates

[ltbringer]

Is your feature request related to a problem? Please describe.
Sentences like "मुझे परसो शाम 5 बजे कॉल करना"
परसो - points to a day before and a day after both.

This produces time entities like so:

{'entities': [{'alternative_index': None,
               'body': 'परसो शाम 5 बजे',
               'dim': 'time',
               'entity_type': 'datetime',
               'grain': 'hour',
               'latent': False,
               'origin': 'value',
               'parsers': [],
               'range': {'end': 23, 'start': 9},
               'score': None,
               'slot_names': [],
               'type': 'datetime',
               'value': '2021-05-31T17:00:00.000+05:30',
               'values': [{'grain': 'hour',
                           'type': 'value',
                           'value': '2021-05-31T17:00:00.000+05:30'}]},
              {'alternative_index': None,
               'body': 'परसो शाम 5 बजे',
               'dim': 'time',
               'entity_type': 'datetime',
               'grain': 'hour',
               'latent': False,
               'origin': 'value',
               'parsers': [],
               'range': {'end': 23, 'start': 9},
               'score': None,
               'slot_names': [],
               'type': 'datetime',
               'value': '2021-06-04T17:00:00.000+05:30',
               'values': [{'grain': 'hour',
                           'type': 'value',
                           'value': '2021-06-04T17:00:00.000+05:30'}]}],
 'version': '0.1.0'}

There is no utility to sort/filter these, I mostly want to use the future values here.

Describe the solution you'd like
I wish to get the oldest or the latest value here.

Describe alternatives you've considered
Writing a plugin to do this but feels like a lot of code to write for a simple comparison check that could happen here.

[ltbringer]

DucklingPlugin should take a kwarg for providing only future dates or only past dates.