fix mypy check failure on main

[rawwar]

pre-commit run --all-files on main results in following error for "Run mypy for airflow"

task_sdk/tests/conftest.py:26: error: Incompatible types in assignment
(expression has type "tuple[()]", target has type "Union[str, list[str]]") [assignment]
config.inicfg["airflow_deprecations_ignore"] = ()
^~

I noticed, in other places, assignment for config.inicfg has the ignore comment -

airflow/tests/conftest.py

Line 43 in 07bf0a7

config.inicfg["airflow_deprecations_ignore"] = (

[potiuk]

Actually the error you get is CAUSED by using "". It should be []

The error is caused by this line:

 if isinstance(deprecations_ignore, (str, os.PathLike)):
self.deprecations_ignore = [deprecations_ignore]

Which turns the "" into a single-element array with empty string.

[potiuk]

Solved :)

[kaxil]

Nice