pyside6-uic python list support

I have created a custom widget for QtDesigner (PySide6) with a new list attribute. When I try to generate the PY file from my UI file using pyside6-uic utility, the generated code translades the list into QStringList instead of a python list. Therefore I cannot run that code, because QStringList is obsolete since PyQt4.

This could be easily solved by translating the "stringlist" UI tag into a python list, like PyQt5 does.