message: derive: bump to 0.1.39
diff: @@ -7,7 +7,7 @@ keywords = ["mathematics", "numerics"]
  license = "MIT/Apache-2.0"
  name = "num-derive"
  repository = "https://github.com/rust-num/num"
  -version = "0.1.38"
  +version = "0.1.39"
  [dependencies]
  quote = "0.1.3"
  