Solo-epd-loader

<!-- Release notes generated using configuration in .github/release.yml at v0.2.7 -->

What's Changed
Bugfixes 🛠
* Remove unused `contamination_threshold` options from functions so that it raises an error if provided at a wrong place


**Full Changelog**: https://github.com/jgieseler/solo-epd-loader/compare/v0.2.6...v0.2.7

<!-- Release notes generated using configuration in .github/release.yml at v0.2.6 -->

What's Changed
Bugfixes 🛠
* Fix handling of `contamination_threshold=0`
* Remove negative electron fluxes (needed for `contamination_threshold=None`)

**Full Changelog**: https://github.com/jgieseler/solo-epd-loader/compare/v0.2.5...v0.2.6

<!-- Release notes generated using configuration in .github/release.yml at v0.2.5 -->

What's Changed
Bugfixes 🛠
* Fix readme to reflect the changes [introduced in version 0.2.4](https://github.com/jgieseler/solo-epd-loader/releases/tag/v0.2.4)

**Full Changelog**: https://github.com/jgieseler/solo-epd-loader/compare/v0.2.4...v0.2.5

<!-- Release notes generated using configuration in .github/release.yml at v0.2.4 -->

What's Changed
* **Remove automatic calculation of STEP electron data as it is not totally straightforward**


**Full Changelog**: https://github.com/jgieseler/solo-epd-loader/compare/v0.2.3...v0.2.4

<!-- Release notes generated using configuration in .github/release.yml at v0.2.3 -->

What's Changed
Bugfixes 🛠
* Fix cdflib<1.0 to avoid incompatibility (workaround for 27)

**Full Changelog**: https://github.com/jgieseler/solo-epd-loader/compare/v0.2.2...v0.2.3

<!-- Release notes generated using configuration in .github/release.yml at v0.2.2 -->

What's Changed
Bugfixes 🛠
* Adjust importing of sunpy.io.read_cdf to be compatible with upcoming sunpy version 5 (workaround for 26)
* Fix code example in readme to reflect the changes [introduced in version 0.2.0](https://github.com/jgieseler/solo-epd-loader/releases/tag/v0.2.0)



**Full Changelog**: https://github.com/jgieseler/solo-epd-loader/compare/v0.2.1...v0.2.2