Not supported for Mac Catalyst

[jasongitmail]

Testing failed:
        While building for Mac Catalyst, no library for this platform was found in '~/myproj/node_modules/@nativescript/canvas/platforms/ios/CanvasNative.xcframework'.
        Testing cancelled because the build failed.

(Encountered while using attempting to use fastlane to automate screenshots for iOS, but not really relevant. The error just surfaced a limitation of nativescript's canvas plugin.)