fix warning: IEx.started?/0 defined in application :iex is used by the current application but the current application does not directly depend on :iex

Author: boydm

mix.exs

@@ -38,6 +38,7 @@ defmodule Scenic.Mixfile do
   def application do
     case Mix.env() do
       :dev ->[extra_applications: [:logger, :iex]]
+      :test ->[extra_applications: [:logger, :iex]]
       _ -> [extra_applications: [:logger]]
     end
   end