What's Changed
* The `contrib` submodule was slightly refactored and `NormalNoise` base models equivalent to the existing `StudenttNoise` models were added. For example: [`BasePolynomialModelN`](https://calibr8.readthedocs.io/en/latest/calibr8_contrib_normal.html#calibr8.contrib.normal.BasePolynomialModelN). (See https://github.com/JuBiotech/calibr8/pull/26.)
* The `BaseModelT` class was deprecated and any code using it should instead inherit from `core.ContinuousUnivariateModel, noise.StudentTNoise` directly.
**Full Changelog**: https://github.com/JuBiotech/calibr8/compare/v6.3.0...v6.4.0