Updated difficulty to be 3

Kenneth Bogner · Kenneth Bogner · commit 5d5bab340f98 · 2017-12-05T08:48:32.000-05:00
diff --git a/config.json b/config.json
@@ -271,7 +271,7 @@
       "slug": "twelve-days",
       "core": false,
       "unlocked_by": null,
-      "difficulty": 4,
+      "difficulty": 3,
       "topics": [
       ]
     },
