Scvelo

What's Changed
* Remove hard `scvi-tools` dependency by michalk8 in https://github.com/theislab/scvelo/pull/1185
* Unpin scikit-learn by Zethson in https://github.com/theislab/scvelo/pull/1194
* Update `scatter` and `update_axes` by WeilerP in https://github.com/theislab/scvelo/pull/1205
* Update `plotting/utils.py::hist` by WeilerP in https://github.com/theislab/scvelo/pull/1217
* Update `VELOVI::train` by WeilerP in https://github.com/theislab/scvelo/pull/1219
* Update `release.yml` by WeilerP in https://github.com/theislab/scvelo/pull/1221
* Remove `debug.py` by WeilerP in https://github.com/theislab/scvelo/pull/1222
* Update `pyptoject.toml` by WeilerP in https://github.com/theislab/scvelo/pull/1224
* Update `pyproject.toml` by WeilerP in https://github.com/theislab/scvelo/pull/1226

New Contributors
* Zethson made their first contribution in https://github.com/theislab/scvelo/pull/1194

**Full Changelog**: https://github.com/theislab/scvelo/compare/v0.3.1...v0.3.2

- Fixes `plotting.velocity_graph`

* Add VELOVI
* Add method to infer transcription rates based on metabolic labeling data
* Fix bugs s.t. code runs with latest versions of `numpy`, `pandas`, `matplotlib`