message: Update "rand" dependency to 0.4.
diff: @@ -12,7 +12,7 @@ homepage = "https://github.com/ebfull/pairing"
  repository = "https://github.com/ebfull/pairing"
  [dependencies]
  -rand = "0.3"
  +rand = "0.4"
  byteorder = "1"
  clippy = { version = "0.0.174", optional = true }
  