CHANGES in GRASS GIS 8.x

https://trac.osgeo.org/grass/wiki/Grass8/NewFeatures80
https://trac.osgeo.org/grass/wiki/Grass8/NewFeatures82

List of releases:

- GitHub list: https://github.com/OSGeo/grass/releases
- Overview list: https://trac.osgeo.org/grass/wiki/Release
- History: https://grass.osgeo.org/home/history/releases/ (starting 1984!)
