v0.4.0

• Adds support for Elixir 1.17
  • This required using a different entry point into IEx and
    adjusts the shape of :shell_opts to be a flat keyword list
  • Elixir also renamed :dot_iex_path -> :dot_iex. The changes
    here account for that for now, but if you previously included
    this in options you'll need to change from
    shell_opts: [[dot_iex_path: path]] to shell_opts: [dot_iex: path]
• Minimum supported Elixir version is now 1.13