- Add the possibility to skip the cross correlation step when creating lagged regressors [50](https://github.com/smoia/phys2cvr/pull/50) ([smoia](https://github.com/smoia))
- Allow confounding matrix and mask to be optional in `stats.regression` [49](https://github.com/smoia/phys2cvr/pull/49) ([smoia](https://github.com/smoia))
- Enhance cross correlation to allow both regressor and reference to be shifted and consider max abs corr [48](https://github.com/smoia/phys2cvr/pull/48) ([smoia](https://github.com/smoia))