Deprecated dependencies

[zhong-al]

To Reproduce

Follow instructions in INSTALL.md. (Side note: pytorchvideo on PyPI is missing cat_all_gather so pip install git+https://github.com/facebookresearch/pytorchvideo was used instead of pip install pytorchvideo)

Searching for sklearn
Reading https://pypi.org/simple/sklearn/
Downloading https://files.pythonhosted.org/packages/46/1c/395a83ee7b2d2ad7a05b453872053d41449564477c81dc356f720b16eac4/sklearn-0.0.post12.tar.gz#sha256=54cff9e20839b7b202321178228af4d9388bedf78425d9299fd9ee170d68802e
Best match: sklearn 0.0.post12
Processing sklearn-0.0.post12.tar.gz
Writing /tmp/easy_install-v4umg4se/sklearn-0.0.post12/setup.cfg
Running sklearn-0.0.post12/setup.py -q bdist_egg --dist-dir /tmp/easy_install-v4umg4se/sklearn-0.0.post12/egg-dist-tmp-nv6yndio
error: Setup script exited with The 'sklearn' PyPI package is deprecated, use 'scikit-learn'
rather than 'sklearn' for pip commands.

Here is how to fix this error in the main use cases:

• use 'pip install scikit-learn' rather than 'pip install sklearn'
• replace 'sklearn' by 'scikit-learn' in your pip requirements files
  (requirements.txt, setup.py, setup.cfg, Pipfile, etc ...)
• if the 'sklearn' package is used by one of your dependencies,
  it would be great if you take some time to track which package uses
  'sklearn' instead of 'scikit-learn' and report it to their issue tracker
• as a last resort, set the environment variable
  SKLEARN_ALLOW_DEPRECATED_SKLEARN_PACKAGE_INSTALL=True to avoid this error

More information is available at
https://github.com/scikit-learn/sklearn-pypi-package

and

Searching for PIL
Reading https://pypi.org/simple/PIL/
No local packages or working download links found for PIL
error: Could not find suitable distribution for Requirement.parse('PIL')

after replacing "sklearn" with "scikit-learn" in setup.py

Expected behavior

Installs SlowFast.

Environment

Red Hat Enterprise Linux Server release 7.9 (Maipo), Python 3.10.14, gnu/11.2.0