Updated packages for the latest 1.19 release:

• Ability to modify Spriteset data (sprite locations and pixel contents) at runtime
• Optional nearest-neighbour upscaling instead of the default bilinear filter for big, blocky pixels
• Added frame raster callback, to get a user-provided function called between frames like a virtual VBLANK interrupt. Especially useful for
  multi-threaded window and interactive Python sessions
• Updated python binding with new features