What's new in the WebKitGTK 2.54.1 release?
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  - Allow pasting in-memory image data from clipboard.
  - Add User-Agent quirk for Amazon Luna.
  - Align the filter surface with the device pixel grid.
  - Fix rendering of scaled or transformed no-repeat background images.
  - Fix rendering of preserve-3d layers when a layer crosses the camera plane.
  - Fix SkiaCompositingLayer filter rendering under transforms.
  - Do not rasterize the part of a tile that the clip drops.
  - Skip non-composited frames when damage is empty.
  - Fix text deleted by input method delete-surrounding in contenteditable.
  - Fix several crashes and rendering issues.