Pydantic V2 migration

[widders]

With Pydantic v2 there have been code changes and this module won't load. I fixed it for my use case with "pydantic<2" in requirements but I guess that's not a long term solution.

Error:

File "/usr/local/lib/python3.10/dist-packages/aiokeydb/__init__.py", line 57, in <module>
  from aiokeydb.client.serializers import SerializerType
File "/usr/local/lib/python3.10/dist-packages/aiokeydb/client/__init__.py", line 40, in <module>
  from aiokeydb.client.config import KeyDBSettings
File "/usr/local/lib/python3.10/dist-packages/aiokeydb/client/config.py", line 8, in <module>
  from aiokeydb.client.types import BaseSettings, validator, lazyproperty, KeyDBUri
File "/usr/local/lib/python3.10/dist-packages/aiokeydb/client/types.py", line 9, in <module>
  from pydantic import BaseSettings as _BaseSettings
File "/usr/local/lib/python3.10/dist-packages/pydantic/__init__.py", line 206, in __getattr__
  return _getattr_migration(attr_name)
File "/usr/local/lib/python3.10/dist-packages/pydantic/_migration.py", line 279, in wrapper
  raise PydanticImportError(
pydantic.errors.PydanticImportError: `BaseSettings` has been moved to the `pydantic-settings` package. See https://docs.pydantic.dev/2.0.1/migration/#basesettings-has-moved-to-pydantic-settings for more details.