Don't use tqdm 4.50.0
tqdm 4.50.0 introduced permission errors on windows
see [here](https://app.circleci.com/pipelines/github/huggingface/datasets/235/workflows/cfb6a39f-68eb-4802-8b17-2cd5e8ea7369/jobs/1111) for the error details.

For now I just added `<4.50.0` in the setup.py
Hopefully we can find what's wrong with this version soon