Make `CognitoSettings` compatible with Pydantic v2

[YaraslauZhylko]

When using Pydantic v2+, CognitoSettings raises a warning about using the deprecated way of configuring the settings model via the Config class and urging to migrate to the new way of doing that via the model_config field.

The warning is not critical. But as more and more projects start migration to Pydantic v2, it seems reasonable to start supporting it as well.

• The warning:

  .venv/lib/python3.11/site-packages/pydantic/_internal/_config.py:219
  /home/yaraslau/projects/relief/backend2.0/.venv/lib/python3.11/site-packages/pydantic/_internal/_config.py:219: 
  PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be 
  removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.3/migration/
    warnings.warn(DEPRECATION_MESSAGE, DeprecationWarning)

• The stacktrace:

  .venv/lib/python3.11/site-packages/fastapi_cognito/__init__.py:4: in <module>
    from .settings_parsers import CognitoSettings
  .venv/lib/python3.11/site-packages/ddtrace/internal/module.py:220: in _exec_module
    self.loader.exec_module(module)
  .venv/lib/python3.11/site-packages/fastapi_cognito/settings_parsers.py:8: in <module>                                                                                                              
  class CognitoSettings(BaseSettings):
  .venv/lib/python3.11/site-packages/pydantic/_internal/_model_construction.py:96: in __new__
    config_wrapper = ConfigWrapper.for_model(bases, namespace, kwargs)
  .venv/lib/python3.11/site-packages/pydantic/_internal/_config.py:104: in for_model
    config_from_namespace = config_dict_from_namespace or prepare_config(config_class_from_namespace)                                                                                          
  .venv/lib/python3.11/site-packages/pydantic/_internal/_config.py:219: in prepare_config
    warnings.warn(DEPRECATION_MESSAGE, DeprecationWarning)
  E   pydantic.warnings.PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated 
  in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.3/migration/

• Doc on the Pydantic v2 way of configuring the models: https://docs.pydantic.dev/latest/usage/model_config/
• Docs on the Pydantic v2 way of configuring the settings: https://docs.pydantic.dev/latest/usage/pydantic_settings/#usage

[markomirosavljev]

Hello, thank you for reporting. I will update settings and create new release soon :)

[markomirosavljev]

I just created new release, I think everything will be correct now :)

Check release here

[YaraslauZhylko]

Yes, the fixed version works without warnings. Thank you.