fix(pyproject.toml): dont allow faker version less then 5.0.0

[T0nd0Tara]

Description

• I've noticed the library is incompatible with low versions of faker.
  for example, this script won't work

from polyfactory.factories import pydantic_factory
import pydantic

class MyModel(pydantic.BaseModel):
    m_id: int
    name: str

class Factory(pydantic_factory.ModelFactory[MyModel]):
    __model__ = MyModel


print(Factory.build())

won't work with version faker==4.0.0 or lower, due to missing Generator attribute json

[github-actions]

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