Enable quokka with :module_directives rule

test/music_library/artists_test.exs

@@ -1,9 +1,10 @@
 defmodule MusicLibrary.ArtistsTest do
   use MusicLibrary.DataCase
 
-  alias MusicLibrary.Artists
   import MusicLibrary.Fixtures.Records
 
+  alias MusicLibrary.Artists
+
   describe "get_artist/1" do
     test "it returns records with essential data" do
       record = record()