Proper environments for deps

Author: ankhers

mix.exs

@@ -26,9 +26,9 @@ defmodule Mongo.Ecto.Mixfile do
       {:ecto, "~> 2.1.0"},
       {:dialyxir, "~> 0.5", only: :dev, runtime: false},
       {:excoveralls, "~> 0.8", only: :test},
-      {:inch_ex, "~> 0.5", only: :docs},
-      {:earmark, "~> 1.0", only: :docs},
-      {:ex_doc, "~> 0.11", only: :docs}
+      {:inch_ex, "~> 0.5", only: [:dev, :test]},
+      {:earmark, "~> 1.0", only: :dev},
+      {:ex_doc, ">= 0.0.0", only: :dev}
     ]
   end