- Windows: SDK version 10.0.20348.0 is now required.
- MacOS: SDK version 12.3 (Xcode 13.3) is now required.
- Legacy swiftshader binaries (`swiftshader/*` on Win/Linux and
`libswiftshader_*.dylib` on MacOS) have been removed (see issue #3176).
Still need to unregister the Content-level factory to stop Alloy loading
unsupported pages.
This reverts commit a21d0c41a4ddf33e189edbfdcb655f898385c63b.