v0.5.2

Fixed

• 32-bit builds no longer fail the Value size guard. The prima-core compile-time assertion
  pinned Value at 24 bytes, the size it takes on 64-bit targets. On 32-bit targets (e.g.
  armv7-unknown-linux-gnueabihf) the tag packs into Number's spare discriminants and Value is
  16 bytes, so the release build aborted with E0080. The guard is now pointer-width aware
  (24 bytes on 64-bit, 16 on 32-bit) while still catching any growth of the hot-path value.