message: Bump to 0.4.0-pre
diff: @@ -8,7 +8,8 @@ categories = [ "algorithms", "data-structures", "science" ]
  license = "MIT OR Apache-2.0"
  name = "num-bigint"
  repository = "https://github.com/rust-num/num-bigint"
  -version = "0.3.2"
  +version = "0.4.0-pre"
  +publish = false
  readme = "README.md"
  build = "build.rs"
  exclude = ["/bors.toml", "/ci/*", "/.github/*"]
  