Chore: Make ready to use with neos 9 #57
Description
To use the Package in a Neos 9 Project, I applied the Code Migration with rector. After this it occured that the Workspace Aspect has to be reworked to be usable with Neos 9.
I already started a Pull-Request: #56
Since I don't understand the Workspace Aspect very deeply yet, it would be helpful if other devs with a deeper understanding would continue to work on it.