Needed for mingw Firefox build.
The WIDL error points to the wrong function, specifically the one after it.
include/windows.ui.composition.interop.idl:35:63: error: parameter 'swapchain' of function 'CreateCompositionSurfaceForHandle' cannot derive from void *
HRESULT CreateCompositionSurfaceForSwapChain([in] IUnknown *swapchain, [out, retval] ICompositionSurface **result);
^
make[1]: *** [Makefile:163749: include/windows.ui.composition.interop.h] Error 1
--
v3: include: Add windows.ui.composition.interop.idl file.
widl: Add support for WinRT HANDLE parameter type.
https://gitlab.winehq.org/wine/wine/-/merge_requests/2620