Run mypy with --no-strict-optional

[alexdrydew]

After the recent release of mypy type annotation must be Optional[...] or Union[None, ...] if default value is None. This is not the case with Toloka-Kit: the problem is that type annotations added in BaseTolokaObjectMetaclass.transform are not propogated to __init__ of the resulting class.

Since this check blocks merging any PRs now, let's disable it till the problem is fixed on our side.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation and examples improvement (changes affected documentation and/or examples)

Checklist:

• I have read the CONTRIBUTING document.
• I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/?lang=en
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[DrhF]

Let's create an issue so as not to forget to fix this

[DrhF]

#133