fix compile

mix.exs

@@ -45,7 +45,7 @@ defp deps do
       {:cachex, "~> 3.0.2"},
       {:httpoison, "~> 1.2.0"},
       {:jason, "~> 1.0"},
-      {:mogrify, "~> 0.6.1"}
+      {:mogrify, "~> 0.6.1"},
       {:ex_machina, "~> 2.2", only: :test},
       {:credo, "~> 0.9.3", only: [:dev, :test]},
       {:mock, "~> 0.3.1", only: :test}