v0.6.0 - feature: new versions of model where added: `v1a_neutrino_rate` and `v2`. Calculation is based on total neutrino rate of each reactor. - fix: `full.covmat.chi2cnp` was removed to avoid confusions. `full.covmat.chi2cnp_alt` was renamed to `full.covmat.chi2cnp`, it is defined as (18)-(19) equations from the [arXiv: 1903.07185](https://arxiv.org/pdf/1903.07185). Only `v1a*` and `v2` were updated.