Ensure Python 3.8+ compatibility

[kernelshard]

• Fixed dict[str, str] to Dict[str, str] in _utils.py for Python 3.8 support
• Added Python version matrix (3.8-3.13) to CI testing.

[ParthSareen]

We should be able to test this with hatch.

[[tool.hatch.envs.hatch-test.matrix]]
  python = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]

something like this in our pyproject.toml instead of using tox. you can use uvx hatch test -acp locally as well. no need to add tox.

[kernelshard]

We should be able to test this with hatch.

[[tool.hatch.envs.hatch-test.matrix]]
  python = ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]

something like this in our pyproject.toml instead of using tox. you can use uvx hatch test -acp locally as well. no need to add tox.

Thanks @ParthSareen for letting me know. But I am confused why this is not working.. Cause if it worked then this code should've raise error at 3.8, as this dict type hint was not supported by then.

def _parse_docstring(doc_string: Union[str, None]) -> dict[str, str]: