Solarmach

<!-- Release notes generated using configuration in .github/release.yml at v0.3.0 -->

What's Changed
* Discontinue support for Python 3.7 due to dependencies

Bugfixes 🛠
* Fix `get_sw_speed()` to work with updated AMDA system

**Full Changelog**: https://github.com/jgieseler/solarmach/compare/v0.2.6...v0.3.0

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

What's Changed
* Add new function `sc_distance()` ([see documentation](https://solarmach.readthedocs.io/en/latest/api/solarmach.sc_distance.html)) that derives the absolute distance between two bodies/spacecraft at a given time

Bugfixes 🛠
* Fix `test_solarmach_get_sw_speed()` for conda-forge


**Full Changelog**: https://github.com/jgieseler/solarmach/compare/v0.2.5...v0.2.6

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

What's Changed
* Create conda-forge version of `pfsspy`, and make loading of `speasy` optional, so that conda-forge version of `solarmach` can be updated (41)

Bugfixes 🛠
* Fix handling of `NaN` results in `get_sw_speed()`, defaulting to `default_vsw` in this case
* Fix some small bugs in PFSS extension
* Fix `plotly.graph_objs.Line is deprecated.`

**Full Changelog**: https://github.com/jgieseler/solarmach/compare/v0.2.4...v0.2.5

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

What's Changed
Bugfixes 🛠
* Fixed a bug in calling `get_sw_speed()` that loaded way too much solar wind data (400 hours instead of 1 hour before defined datetime)

**Full Changelog**: https://github.com/jgieseler/solarmach/compare/v0.2.3...v0.2.4

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

What's Changed
New Features 🎉
* Add function `get_sw_speed()` that tries to automatically obtain solar wind speed measurement for different spacecraft (fixes 15). See [documentation](https://solarmach.readthedocs.io/en/latest/solarmach.html?highlight=get_sw_speed) for details.
* Add full documentation [solarmach.readthedocs.io](https://solarmach.readthedocs.io)
* Add code coverage analysis [codecov.io/gh/jgieseler/solarmach](https://codecov.io/gh/jgieseler/solarmach)


**Full Changelog**: https://github.com/jgieseler/solarmach/compare/v0.2.2...v0.2.3

What's Changed
Bugfixes 🛠
* Fix too different values in long_sector_vsw causing a plotting glitch (33). Thanks to S. Nyberg for the fix!


**Full Changelog**: https://github.com/jgieseler/solarmach/compare/v0.2.1...v0.2.2