WebKit macOS 12.0 Beta 2 to Beta 3 API Differences

WKFoundation.h
Added #def WK_API_AVAILABLE
Added #def WK_API_UNAVAILABLE
Added #def WK_CLASS_AVAILABLE
Added #def WK_API_DEPRECATED
Added #def WK_API_DEPRECATED_WITH_REPLACEMENT
Added #def WK_CLASS_DEPRECATED_WITH_REPLACEMENT
WKUIDelegate.h
Added -[WKUIDelegate webView:requestDeviceOrientationAndMotionPermissionForOrigin:initiatedByFrame:decisionHandler:]