Stormcatchments

What's Changed
* CI: Create workflow that builds and deploys to PyPI by EwoutH in https://github.com/t-ott/stormcatchments/pull/14
* Topology by t-ott in https://github.com/t-ott/stormcatchments/pull/18
* Multi out fix by t-ott in https://github.com/t-ott/stormcatchments/pull/20
* Add topology section to README by t-ott in https://github.com/t-ott/stormcatchments/pull/21
* Sphinx docs setup by t-ott in https://github.com/t-ott/stormcatchments/pull/24


**Full Changelog**: https://github.com/t-ott/stormcatchments/compare/v0.3.1...v0.4.0

What's Changed
* Redefine test DEM CRS by t-ott in https://github.com/t-ott/stormcatchments/pull/17


**Full Changelog**: https://github.com/t-ott/stormcatchments/compare/v0.3.0...v0.3.1

What's Changed
* CI: Create initial GitHub Actions workflow by EwoutH in https://github.com/t-ott/stormcatchments/pull/13
* setup.py: Require Python 3.8 of higher by EwoutH in https://github.com/t-ott/stormcatchments/pull/15
* Update GPLv3 license