Missing Singapore Deepavali for 2021

[jack-pace]

This website suggests that it is Thursday 4th November 2021.
https://publicholidays.sg/deepavali/

Without this hardcoded date I am unable to use workalendar to find out any holidays in Singapore for 2021!

I am using python 3.6 and workalendar 7.1.1.

Example

import datetime
import workalendar
calendar = workalendar.registry.registry.get_calendar_class("SG")()
calendar.is_holiday(datetime.date(2021, 1, 1))

.../site-packages/workalendar/core.py:720: UserWarning: Please take note that, due to arbitrary decisions, this Islamic calendar computation may be wrong.
  warnings.warn('Please take note that, due to arbitrary decisions, '
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
...   ...   ...   ...   ...   ...   ...   ...   ...   ...   ...
KeyError: 'Missing date for Singapore Deepavali for year: 2021'

[jack-pace]

Ideally we'd be able to suppress this error with a flag if we didn't mind about missing Deepavali or other holidays implemented in this way.
For example:

import datetime
import workalendar
calendar = workalendar.registry.registry.get_calendar_class("SG")()
calendar.is_holiday(
    datetime.date(2021, 1, 1),
    best_effort=True,  # Doesn't raise if Deepavali or any other holiday isn't known
)

Does anyone know what would be involved to achieve this? Or have any other opinions / suggestions?

[brunobord]

closed by merging #433 ; release is on its way.

[brunobord]

version 7.2.0 was just released, the packages were uploaded on PyPI, which includes your contribution. Happy upgrading!

[jack-pace]

@brunobord Thank you very much!