pyqtSignal.__init__ has bunch of parameters and overloads that are not properly annotated

https://www.riverbankcomputing.com/static/Docs/PyQt5/signals_slots.html#PyQt5.QtCore.pyqtSignal

https://github.com/stlehmann/PyQt5-stubs/blob/811462b34ee151b898289ae8f1de8af30c690c55/PyQt5-stubs/QtCore.pyi#L44-L45