How to set the [CRS][1] when writing an [ESRI Shapefile][2] using [Fiona][3] on a modern Python version (>3.x)?

Why "modern"? Because Python 2 is now deprecated and this user asked a similar question for Python 2.7, which received (now probably) old fashioned answers: https://gis.stackexchange.com/questions/281447/fiona-fails-to-write-crs-to-shapefile


  [1]: https://en.wikipedia.org/wiki/Spatial_reference_system
  [2]: https://www.esri.com/content/dam/esrisites/sitecore-archive/Files/Pdfs/library/whitepapers/pdfs/shapefile.pdf
  [3]: https://fiona.readthedocs.io/en/latest/manual.html