if no results, expecting an empty list

[wasperen2]

Describe the bug
When doing a .select(ids=[...]), for an _id that does not exist, one would expect an empty list rather than None

To Reproduce

import uuid
from typing import Optional

from pydantic import Field
from pydantic_redis import Store, RedisConfig, Model


class SomeModel(Model):
    _primary_key_field = "id"
    id: str = Field(
        default_factory=lambda: uuid.uuid4().hex,
    )
    name: str = Field()


store = Store(
    name="none should return a list too",
    redis_config=RedisConfig(host='localhost', port=6379, db=6)
)

store.register_model(SomeModel)

parent = SomeModel(name="bong bing")

SomeModel.insert(parent)

models_received = SomeModel.select(ids=["some none existing id"])
print(models_received)
assert isinstance(models_received, list)

Expected behavior
One would expect this assertion to pass. Instead, we get:

    assert isinstance(models_received, list)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError
None

[wasperen2]

If columns is specified, the select method does return an empty list