[FEATURE] Pylance gives "Type of "to_json" is partially unknown" even if inherit from DataClassJsonMixin

[RSATom]

Description

Even if I'm trying to use example code with mixin from readme:

from dataclasses import dataclass
from dataclasses_json import DataClassJsonMixin

@dataclass
class Person(DataClassJsonMixin):
    name: str

lidatong = Person('lidatong')

# A different example from Approach 1 above, but usage is the exact same
assert Person.from_json(lidatong.to_json()) == lidatong

P.S.: I'm using Visual Studio Code