Sleepecg

Added
- Add support to store NSRR token in environment variable or user config ([243](https://github.com/cbrnr/sleepecg/pull/243) by [Simon Pusterhofer](https://github.com/simon-p-2000))
- Add Python 3.13+ support by transforming wheel builds using ABI3 mode ([251](https://github.com/cbrnr/sleepecg/pull/251) by [Eric Larson](https://github.com/larsoner))

Changed
- Split `get_config` function into `get_config` and `get_config_value` to get the entire configuration (as a dictionary) or an individual configuration key, respectively ([229](https://github.com/cbrnr/sleepecg/pull/225) by [Clemens Brunner](https://github.com/cbrnr))

Removed
- Remove Python 3.9 support ([241](https://github.com/cbrnr/sleepecg/pull/241) by [Clemens Brunner](https://github.com/cbrnr))

Fixed
- Fix `plot_ecg` for newer versions of Matplotlib ([225](https://github.com/cbrnr/sleepecg/pull/225) by [Clemens Brunner](https://github.com/cbrnr))

Changed
- Switch to Keras 3 classifiers ([217](https://github.com/cbrnr/sleepecg/pull/217) by [Clemens Brunner](https://github.com/cbrnr))

Added
- Add support for Python 3.12 ([207](https://github.com/cbrnr/sleepecg/pull/207) by [Clemens Brunner](https://github.com/cbrnr))

Changed
- Use [edfio](https://github.com/the-siesta-group/edfio) for reading and writing EDF files ([#195](https://github.com/cbrnr/sleepecg/pull/195) by [Florian Hofer](https://github.com/hofaflo))

Changed
- Use absolute imports internally ([170](https://github.com/cbrnr/sleepecg/pull/170) by [Clemens Brunner](https://github.com/cbrnr))
- Move usage examples to documentation website ([190](https://github.com/cbrnr/sleepecg/pull/190) by [Clemens Brunner](https://github.com/cbrnr))

Changed
- Remove dependency on pandas for `read_gudb` ([134](https://github.com/cbrnr/sleepecg/pull/134) by [Florian Hofer](https://github.com/hofaflo))
- Update SHHS encoding and missing data handling for `read_shhs` ([139](https://github.com/cbrnr/sleepecg/pull/139) by [Andrew Gilbert](https://github.com/adgilbert))
- Ignore expected warnings during feature extraction ([142](https://github.com/cbrnr/sleepecg/pull/142) by [Florian Hofer](https://github.com/hofaflo))