v0.5.0

Minor Changes

• dc70e1a: What goes on the screen is now composition: src/Screen.8bx — <Title />,
  or a <Board /> that is the HUD over sixteen <Tiles /> — written as 8BX
  elements over the drawing calls tile.8bs and its twins provide. The
  rules and the board move to src/game.8bs; src/2048.8bs is the program
  that drives both. The same functions at the same sizes on every target —
  2763 bytes on the 4K PET 2001 and 3490 on the unexpanded VIC-20, as before
  — and 60 bytes less on every build that animates. Needs @8bitscript/cli
  0.11.0.