Lightkit

What's Changed
* Refactor CI setup and add pre-commit configuration by borchero in https://github.com/borchero/lightkit/pull/2

New Contributors
* borchero made their first contribution in https://github.com/borchero/lightkit/pull/2

**Full Changelog**: https://github.com/borchero/lightkit/compare/0.4.4...0.5.0

- Remove `model_` property from base estimator

- Remove useless print statements

- Fixes bug when `lightkit.data.DataLoader` is used during prediction

- Pretty-print JSON configurations

- Fix bug for saving and loading estimators