Build new version and publish to NuGet

Change the Package Version of the CADability project to a new version e.g. 1.0.20

In the Package Manage Console run these commands:

git commit -am "v1.0.20"

git tag v1.0.20

git push origin master --tags

Verify that the workflow ran successfully https://github.com/FriendsOfCADability/CADability/actions