This adds support for Revit 2022 and 2023 and removes legacy Revit versions. (use older installers if you want those).
NOTE: These add-ins were only updated and verified to have loaded in Revit 2020, 2021, 2022 & 2023. Compatibility is not promised in any way or form; please mind the license and use it at your own risk.
Special thanks to @naumanmy for the changes in his PR for this release.