Feature request: Set title in pdf properties (Priority low)

[bfw25]

Hello,
thank you very much for implementing this wonderful library. I learned how to use it to generate a factur-X invoice from a pdf. One small detail bothers me: The input pdf has a title in its propeties.
This value is not copied and cannot be assigned, as is is possible for instance with
Exporter.setCreator(author)
I have found some matching lines in the code that have been deleted.
Is it intented that this option is not supported, or have I overlooked something?

[jstaerk]

I dont believe it's there yet so you did not overlook anything, however, feature requests are issues, could you please request over here https://github.com/ZUGFeRD/mustangproject/issues ? thanks