https://github.com/localstack/localstack/blob/e7efc768a20e75feafe3702a5a6e477a233feff2/localstack/utils/aws/aws_stack.py#L904

```
File "/usr/local/lib/python3.8/site-packages/localstack/services/generic_proxy.py", line 50, in <module>
from localstack.utils.aws import aws_stack
File "/usr/local/lib/python3.8/site-packages/localstack/utils/aws/aws_stack.py", line 904, in <module>
) -> dict[str, str]:
TypeError: 'type' object is not subscriptable
```

Please fix to `Dict[str, str]`
"""Custom boto3 session that points to local endpoint URLs."""
    def resource(self, service, *args, **kwargs):
        self._fix_endpoint(kwargs)
        return connect_to_resource(service, *args, **kwargs)
    def client(self, service, *args, **kwargs):
        self._fix_endpoint(kwargs)
        return connect_to_service(service, *args, **kwargs)
    def _fix_endpoint(self, kwargs):
        if "amazonaws.com" in kwargs.get("endpoint_url", ""):
            kwargs.pop("endpoint_url")
def get_boto3_session(cache=True):
    if not cache or CREATE_NEW_SESSION_PER_BOTO3_CONNECTION:
        return boto3.session.Session()
    
    return boto3
def get_region():
    
    from localstack.utils.aws.request_context import get_region_from_request_context
    region = get_region_from_request_context()
    if region:
        return region
    
    return get_local_region()
def get_partition(region_name: str = None):
    region_name = region_name or get_region()
    return boto3.session.Session().get_partition_for_region(region_name)
def get_local_region():