differences_in_mastoapi_responses.md: fullname & bio are optionnal

[ci skip]

mix.exs

@@ -114,6 +114,7 @@ defmodule Pleroma.Mixfile do
       {:quack, "~> 0.1.1"},
       {:benchee, "~> 1.0"},
       {:esshd, "~> 0.1.0"},
+      {:ex_rated, "~> 1.2"},
       {:plug_static_index_html, "~> 1.0.0"}
     ] ++ oauth_deps
   end