fix flask dependencies

[wistuba]

Reference Issues/PRs

Fixes #271

What does this implement/fix? Explain your changes.

downgrade setuptools requirement to avoid build failures

Any other comments?

Tested changes on all flask problems with

python -m swebench.harness.run_evaluation --predictions_path gold --max_workers 1 --dataset princeton-nlp/SWE-bench --run_id gold --cache_level instance --instance_ids pallets__flask-4045 pallets__flask-4074 pallets__flask-4160 pallets__flask-4169 pallets__flask-4544 pallets__flask-4575 pallets__flask-4642 pallets__flask-4935 pallets__flask-4992 pallets__flask-5014 pallets__flask-5063

All images build and all instances are resolved with gold patch:

Total instances: 11
Instances submitted: 11
Instances completed: 11
Instances incomplete: 0
Instances resolved: 11
Instances unresolved: 0
Instances with empty patches: 0
Instances with errors: 0
Unstopped containers: 0
Unremoved images: 11