Python 3.9 support broken in 0.44.0

[Benzhaomin]

System Info

MacOS Sonoma 14.7
Python 3.9.19

Reproduction

Running fine-tuning with transformers.

  File "/opt/dataiku/code-env/lib/python3.9/site-packages/trl/trainer/sft_trainer.py", line 451, in train
    output = super().train(*args, **kwargs)
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/transformers/trainer.py", line 1938, in train
    return inner_training_loop(
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/accelerate/utils/memory.py", line 153, in decorator
    return function(batch_size, *args, **kwargs)
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/transformers/trainer.py", line 2095, in _inner_training_loop
    model, self.optimizer = self.accelerator.prepare(self.model, self.optimizer)
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/accelerate/accelerator.py", line 1326, in prepare
    result = tuple(
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/accelerate/accelerator.py", line 1327, in <genexpr>
    self._prepare_one(obj, first_pass=True, device_placement=d) for obj, d in zip(args, device_placement)
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/accelerate/accelerator.py", line 1202, in _prepare_one
    optimizer = self.prepare_optimizer(obj, device_placement=device_placement)
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/accelerate/accelerator.py", line 2119, in prepare_optimizer
    optimizer = AcceleratedOptimizer(optimizer, device_placement=device_placement, scaler=self.scaler)
  File "/opt/dataiku/code-env/lib/python3.9/site-packages/accelerate/optimizer.py", line 75, in __init__
    self.optimizer.load_state_dict(state_dict)
  File "/opt/dataiku/code-env/lib64/python3.9/site-packages/bitsandbytes/optim/optimizer.py", line 176, in load_state_dict
    if any(p_len != s_len for p_len, s_len in zip(param_lens, saved_lens, strict=True)):
TypeError: zip() takes no keyword argument

Expected behavior

No failure or a statement that Python 3.9 is no longer supported. Yank the release from Pypi as well.