Fix for macOS versions older than 13

Fixes and improvements

• Restored desktop app support for macOS versions older than 13.

  • If you were affected, please download the latest version of Rive for macOS here.

• Fixed issue with nested artboard animations playing back at double speed in the parent artboard.

• Clicking on the background of an artboard should no longer select a different artboard.

• Resolved incorrect behavior when editing mesh vertices with the Pen tool.

• Fixed issue with Pointer Enter and Pointer Exit listeners not being correctly triggered for an underlying shape when moving the cursor across overlapping shapes when both shapes had Pointer Enter or Pointer Exit listeners.

• Fixed issue with black (#000000) shapes with 0% opacity being visible in the editor as black.