1.6.4 (2026-05-22)

Bug Fixes

• lzma2: prevent undefined bit shift overflow in dictionary calculation (#456) (8d9854b)
• Override ppmd package with 32-bit fix (#458) (38c26cd), closes #457
• types: prevent implicit 32-bit overflow panic and OOM DoS in checkUint64 (#453) (c9e301e)