geo-0.20.0
806: Prepare for geo 0.20.0 release. r=michaelkirk a=frewsxcv - [x] I agree to follow the project's [code of conduct](https://github.com/georust/geo/blob/main/CODE_OF_CONDUCT.md). - [x] I added an entry to `CHANGES.md` if knowledge of this change could be valuable to users. --- Co-authored-by: Corey Farwell <coreyf@rwell.org>