* Major rewrite of DSEC dataset. It's now possible to choose from any combination of recordings, train/test split, data and targets.
* Support for target slicing in SlicedDataset. Previously we could only slice data, now we can do slicing based on data and targets.
* `transforms` parameter for most datasets, in addition to `transform` and `target_transform`. This allows a user to pass a transform that will be called on data and targets at the same time.
* `CenterCrop` transform for events, similar to what the frame-based equivalent does.
* Improvements under the hood: slicers consolidation in one file, bug fixes, documentation updates
* Exploration for the new Torch Data API under tonic/prototype. Thanks to fabhertz95