Merge branch 'captcha' into 'develop'

Make captcha (kocaptcha) stateless

See merge request pleroma/pleroma!585

test/captcha_test.exs

@@ -29,16 +29,18 @@ defmodule Pleroma.CaptchaTest do
     end
 
     test "new and validate" do
-      assert Kocaptcha.new() == %{
-               type: :kocaptcha,
-               token: "afa1815e14e29355e6c8f6b143a39fa2",
-               url: "https://captcha.kotobank.ch/captchas/afa1815e14e29355e6c8f6b143a39fa2.png"
-             }
+      new = Kocaptcha.new()
+      assert new[:type] == :kocaptcha
+      assert new[:token] == "afa1815e14e29355e6c8f6b143a39fa2"
+
+      assert new[:url] ==
+               "https://captcha.kotobank.ch/captchas/afa1815e14e29355e6c8f6b143a39fa2.png"
 
       assert Kocaptcha.validate(
-               "afa1815e14e29355e6c8f6b143a39fa2",
-               "7oEy8c"
-             )
+               new[:token],
+               "7oEy8c",
+               new[:answer_data]
+             ) == :ok
     end
   end
 end