Pyprop8

What's Changed
* fix missing copy in PointSource by Thomas-Ulrich in https://github.com/valentineap/pyprop8/pull/30

New Contributors
* Thomas-Ulrich made their first contribution in https://github.com/valentineap/pyprop8/pull/30

**Full Changelog**: https://github.com/valentineap/pyprop8/compare/v1.1.4...v1.1.5

**Full Changelog**: https://github.com/valentineap/pyprop8/compare/v1.1.3...v1.1.4

What's Changed
* Some tidying up and work on docs by valentineap in https://github.com/valentineap/pyprop8/pull/24
* Added multiprocessing support by valentineap in https://github.com/valentineap/pyprop8/pull/26
* Fix typo in DerivativeSwitches example by dominik-strutz in https://github.com/valentineap/pyprop8/pull/27

New Contributors
* dominik-strutz made their first contribution in https://github.com/valentineap/pyprop8/pull/27

**Full Changelog**: https://github.com/valentineap/pyprop8/compare/v1.1.2...v1.1.3

JOSS paper accepted AND Zenodo tracking enabled!

JOSS paper accepted

Following JOSS review