Not support Kicad 10 RC2

[gonboy]

display below information

Traceback (most recent call last): File "C:\Users/xx/Documents/KiCad/10.0/scripting\plugins\kicad-jlcpcb-tools\mainwindow.py", line 984, in generate_fabrication_data count = self.count_order_number_placeholders() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users/xx/Documents/KiCad/10.0/scripting\plugins\kicad-jlcpcb-tools\mainwindow.py", line 934, in count_order_number_placeholders and drawing.GetFilled() ^^^^^^^^^^^^^^^^^ AttributeError: 'PCB_SHAPE' object has no attribute 'GetFilled'. Did you mean: 'SetFilled'?

KiCad Version

](https://github.com/Bouni/kicad-jlcpcb-tools/issues)