Spey-pyhf

This update improves the efficiency of plug-in initialisation.

What's Changed
* Initialisation efficiency improvement by jackaraz in https://github.com/SpeysideHEP/spey-pyhf/pull/10


**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.3...v0.1.4

This update provides a bug fix for the `simplify` module, which was crashing during signal injection.

Detailed changelog can be found in [this link](https://spey-pyhf.readthedocs.io/en/main/releases/changelog-v0.1.html#release-notes-v0-1).

What's Changed
* Issue during signal injection in https://github.com/SpeysideHEP/spey-pyhf/pull/9

**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.2...v0.1.3

pyhf` dependency has been updated.

What's Changed
* readthedocs compatibility in https://github.com/SpeysideHEP/spey-pyhf/pull/7
* Update `pyhf` version in https://github.com/SpeysideHEP/spey-pyhf/pull/8


**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.1...v0.1.2

This release implements a new plug-in for [spey](https://github.com/SpeysideHEP/spey). With this plug-in, the user can map the pyhf full likelihoods to the simplified likelihood framework.

The full changelog can be found in [this link](https://github.com/SpeysideHEP/spey-pyhf/blob/v0.1.1/docs/releases/changelog-v0.1.1.md).

What's Changed
* build: Update ``pyhf`` to v0.7.3 by matthewfeickert in https://github.com/SpeysideHEP/spey-pyhf/pull/1
* Simplifier by jackaraz in https://github.com/SpeysideHEP/spey-pyhf/pull/2
* Extend sampler by jackaraz in https://github.com/SpeysideHEP/spey-pyhf/pull/3

New Contributors
* matthewfeickert made their first contribution in https://github.com/SpeysideHEP/spey-pyhf/pull/1

**Full Changelog**: https://github.com/SpeysideHEP/spey-pyhf/compare/v0.1.0...v0.1.1

Initial release for `spey-pyhf` plug-in.