Ensure __info__/1 is available

Erlang modules do not have this function

Author: edgurgel

lib/mimic/module.ex

@@ -121,7 +121,7 @@ defmodule Mimic.Module do
   end
 
   defp generate_mimic_struct(module) do
-    if module.__info__(:struct) != nil do
+    if function_exported?(module, :__info__, 1) && module.__info__(:struct) != nil do
       required_fields = for %{field: field, required: true} <- module.__info__(:struct), do: field
 
       quote do

mix.exs

@@ -2,7 +2,7 @@ defmodule Mimic.Mixfile do
   use Mix.Project
 
   @source_url "https://github.com/edgurgel/mimic"
-  @version "1.8.0"
+  @version "1.8.1"
 
   def project do
     [