Compatibility with python 3.7, 3.8

[Jianxin Ma]

Is it possible for you to change list[str] to List[str] (from typing import List) or list such that it is compatible with python 3.8? There are still many production environments that use py 3.8.

>>> import modelscope_studio
Traceback (most recent call last):
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_typing_extra.py", line 240, in eval_type_backport
    return typing._eval_type(  # type: ignore
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/typing.py", line 270, in _eval_type
    return t._evaluate(globalns, localns)
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/typing.py", line 518, in _evaluate
    eval(self.__forward_code__, globalns, localns),
  File "<string>", line 1, in <module>
TypeError: 'type' object is not subscriptable

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/modelscope_studio/__init__.py", line 1, in <module>
    from .components.Chatbot import ModelScopeChatbot as Chatbot
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/modelscope_studio/components/Chatbot/__init__.py", line 24, in <module>
    class MultimodalMessage(GradioModel):
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_model_construction.py", line 178, in __new__
    set_model_fields(cls, bases, config_wrapper, types_namespace)
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_model_construction.py", line 452, in set_model_fields
    fields, class_vars = collect_model_fields(cls, bases, config_wrapper, types_namespace, typevars_map=typevars_map)
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_fields.py", line 122, in collect_model_fields
    type_hints = get_cls_type_hints_lenient(cls, types_namespace)
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_typing_extra.py", line 212, in get_cls_type_hints_lenient
    hints[name] = eval_type_lenient(value, globalns, localns)
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_typing_extra.py", line 224, in eval_type_lenient
    return eval_type_backport(value, globalns, localns)
  File "/home/majx13/miniconda3/envs/py38/lib/python3.8/site-packages/pydantic/_internal/_typing_extra.py", line 249, in eval_type_backport
    raise TypeError(
TypeError: You have a type annotation 'Optional[Union[list[str], str]]' which makes use of newer typing features than are supported in your version of Python. To handle this error, you should either remove the use of new syntax or install the `eval_type_backport` package.

[Jianxin Ma]

Or add eval_type_backport to the requirements.txt

[Col0ring]

We have adapted Python 3.8 inmodelscope_studio@0.1.6, Thanks!