DeepChem Updates of the last week of June, 2024

Here is a quick summary of merged pull requests for DeepChem during the last week of June:

1. fixing unit tests and doc test imports: This PR fixes unit tests by modifying versions and workflows in include packages.
2. Add normalizingflow model: This PR adds normalizing flow model in PyTorch to generate molecules.
3. Porting Graph Gather Layer to PyTorch: This PR ports Graph Gather Layer to PyTorch.
4. Made changes to image transformer: This PR adds the ImageTransformer method to allow resizing of images within ImageDatasets (or NumpyDatasets) using only Pillow to transform both input (X) and labels (y).