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Fixed rendering of backing-sharing layers with transforms ( r245205).Changed to repaint when the set of backing-sharing layers changes ( r245220).Changed layers painting into shared backing to contribute to overlap ( r245502).

Implemented backing-sharing in compositing layers, allowing overlap layers to paint into the backing store of another layer ( r245170).Changed to only consume the user gesture when the user explicitly denies access and made document.hasStorageAccess() return true when the feature is off ( r245025).Fixed calling preventDefault() on pointerdown to prevent “compatibility” mouse events ( r245585).Fixed isPrimary property of pointercancel events to match previous events for that pointer ( r245020).Changed to return InvalidStateError to sites whenever authenticators return such error ( r245262).Changed to cancel the pending request when a new request is made ( r245043).Enabled WebAuthN by default on macOS ( r245589).This release covers WebKit revisions 245007-245618. After updating to macOS Mojave, you may have to reinstall Safari Technology Preview. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS Mojave and from the Mac App Store’s Updates tab on macOS High Sierra. Safari Technology Preview Release 83 is now available for download for macOS Mojave and macOS High Sierra.
