Spey

This release introduces specific control mechanisms for invalid covariance matrices, such as ones with infinite determinants.

What's Changed
* [bug] Issue with infinite determinant in https://github.com/SpeysideHEP/spey/pull/47

**Full Changelog**: https://github.com/SpeysideHEP/spey/compare/v0.2.0...v0.2.1

This release enables the plugin's usage with spey v0.2.0.

What's Changed
* Adapt to the latest spey version in https://github.com/SpeysideHEP/spey-pyhf/pull/18

**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.10...v0.2.0

This update addresses a bug in the statistics combination module for a specific use case. When searching for the optimal value of $\hat{\mu}$ in the combined likelihood for the optimiser, the computation for $\sigma_\mu$ may crash if the Hessian matrix is non-invertible. In cases where the Hessian is non-invertible, the search for optimal $\hat{\mu}$ is halted, deferring to the optimizer to complete the estimation.

Thanks to joes-git for pointing this out.

What's Changed
The full changelog for version 1 can be found [here](https://spey.readthedocs.io/en/main/releases/changelog-v0.1.html).

* Bugfix in stat combiner by jackaraz in https://github.com/SpeysideHEP/spey/pull/43

**Full Changelog**: https://github.com/SpeysideHEP/spey/compare/v0.1.10...v0.1.11

This update resolves a bug concerning the sorting of the removed channels in the patched set.

Thanks to Rav2 for pointing this out.

What's Changed
* Issue with the patch maker in https://github.com/SpeysideHEP/spey-pyhf/pull/17

**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.9...v0.1.10

This update implements a bug fix for channels that have been removed from the likelihood.

Thanks to Rav2 for pointing this out.

What's Changed
* Channels were not removed in the interpreter by jackaraz in https://github.com/SpeysideHEP/spey-pyhf/pull/16

**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.8...v0.1.9

This update fixes a bug in uncertainty quantification while mapping a full statistical model onto the effective sigma model.

What's Changed
* Bugfix in Simplify in https://github.com/SpeysideHEP/spey-pyhf/pull/15


**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.7...v0.1.8