Type validator is broken on python3.9.0-1

[RobertCraigie]

Bug description

tests/test_validator.py::test_valid and tests/test_validator.py::test_recursive fail on python3.9.1

test_valid output:

―――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――― test_valid ――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――

    def test_valid() -> None:
        """Basic usage with correct data"""
>       validated = validate(types.IntFilter, {'equals': 1})

tests/test_validator.py:14: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/private/tmp/tox/prisma-client-py/py39/lib/python3.9/site-packages/prisma/validator.py:81: in validate
    instance = model.parse_obj(data)
pydantic/main.py:578: in pydantic.main.BaseModel.parse_obj
    ???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

>   ???
E   pydantic.error_wrappers.ValidationError: 7 validation errors for IntFilter
E   not_in
E     field required (type=value_error.missing)
E   lt
E     field required (type=value_error.missing)
E   lte
E     field required (type=value_error.missing)
E   gt
E     field required (type=value_error.missing)
E   gte
E     field required (type=value_error.missing)
E   in
E     field required (type=value_error.missing)
E   not
E     field required (type=value_error.missing)

pydantic/main.py:406: ValidationError

How to reproduce

tox -e py39 -- tests/test_validator.py

Expected behavior

Tests should pass

Environment & setup

• OS: Mac OS
• Database: SQLite
• Python version: Python 3.9.1