message: fix: Provide a Buffer to xxhash.Stream
  This fixes the digest being a number instead of a buffer.
diff: @@ -73,7 +73,7 @@ class ChecksumStream extends stream.Transform {
  // Seed value 0x45544348 = ASCII "ETCH"
  const seed = 0x45544348
  const is64Bit = process.arch === 'x64' || process.arch === 'aarch64'
  - hash = new xxhash.Stream(seed, is64Bit ? 64 : 32)
  + hash = new xxhash.Stream(seed, is64Bit ? 64 : 32, Buffer.allocUnsafe(is64Bit ? 8 : 4))
  } else {
  hash = _.attempt(crypto.createHash, algorithm)
  }
  