New Features
- Support py3.10 annotations ([3601](https://github.com/fastai/fastai/issues/3601))
Bugs Squashed
- Fix pin_memory=True breaking (batch) Transforms ([3606](https://github.com/fastai/fastai/pull/3606)), thanks to [johan12345](https://github.com/johan12345)
- Add Python 3.9 to `setup.py` for PyPI ([3604](https://github.com/fastai/fastai/pull/3604)), thanks to [nzw0301](https://github.com/nzw0301)
- removes add_vert from get_grid calls ([3593](https://github.com/fastai/fastai/pull/3593)), thanks to [kevinbird15](https://github.com/kevinbird15)
- Making `loss_not_reduced` work with DiceLoss ([3583](https://github.com/fastai/fastai/pull/3583)), thanks to [hiromis](https://github.com/hiromis)
- Fix bug in URLs.path() in 04_data.external ([3582](https://github.com/fastai/fastai/pull/3582)), thanks to [malligaraj](https://github.com/malligaraj)
- Custom name for metrics ([3573](https://github.com/fastai/fastai/pull/3573)), thanks to [bdsaglam](https://github.com/bdsaglam)
- Update import for show_install ([3568](https://github.com/fastai/fastai/pull/3568)), thanks to [fr1ll](https://github.com/fr1ll)
- Fix Classification Interpretation ([3563](https://github.com/fastai/fastai/pull/3563)), thanks to [warner-benjamin](https://github.com/warner-benjamin)
- Updates Interpretation class to be memory efficient ([3558](https://github.com/fastai/fastai/pull/3558)), thanks to [warner-benjamin](https://github.com/warner-benjamin)
- Learner.show_results uses passed dataloader via dl_idx or dl arguments ([3554](https://github.com/fastai/fastai/pull/3554)), thanks to [warner-benjamin](https://github.com/warner-benjamin)
- Fix learn.export pickle error with MixedPrecision Callback ([3544](https://github.com/fastai/fastai/pull/3544)), thanks to [warner-benjamin](https://github.com/warner-benjamin)
- Fix concurrent LRFinder instances overwriting each other by using tempfile ([3528](https://github.com/fastai/fastai/pull/3528)), thanks to [warner-benjamin](https://github.com/warner-benjamin)
- Fix _get_shapes to work with dictionaries ([3520](https://github.com/fastai/fastai/pull/3520)), thanks to [ohmeow](https://github.com/ohmeow)
- Fix torch version checks, remove clip_grad_norm check ([3518](https://github.com/fastai/fastai/pull/3518)), thanks to [warner-benjamin](https://github.com/warner-benjamin)
- Fix nested tensors predictions compatibility with fp16 ([3516](https://github.com/fastai/fastai/pull/3516)), thanks to [tcapelle](https://github.com/tcapelle)
- Learning rate passed via OptimWrapper not updated in Learner ([3337](https://github.com/fastai/fastai/issues/3337))
- Different results after running `lr_find()` at different times ([3295](https://github.com/fastai/fastai/issues/3295))
- lr_find() may fail if run in parallel from the same directory ([3240](https://github.com/fastai/fastai/issues/3240))