New Features
- add split value argument to ColSplitter ([3737](https://github.com/fastai/fastai/pull/3737)), thanks to [DanteOz](https://github.com/DanteOz)
- deterministic repr for PIL images ([3762](https://github.com/fastai/fastai/issues/3762))
- option to skip default callbacks in `Learner` ([3739](https://github.com/fastai/fastai/issues/3739))
- update for nbdev2 ([3747](https://github.com/fastai/fastai/issues/3747))
Bugs Squashed
- IntToFloatTensor failing on Mac mps due to missing op ([3761](https://github.com/fastai/fastai/issues/3761))
- fix for pretrained in vision.learner ([3746](https://github.com/fastai/fastai/pull/3746)), thanks to [peterdudfield](https://github.com/peterdudfield)
- fix same file error message when resizing image ([3743](https://github.com/fastai/fastai/pull/3743)), thanks to [cvergnes](https://github.com/cvergnes)