config.json in trackler-2.0.8.1

- old
+ new

@@ -3,9 +3,15 @@
   "language": "Haskell",
   "repository": "https://github.com/exercism/xhaskell",
   "active": true,
   "exercises": [
     {
+      "slug": "hello-world",
+      "difficulty": 1,
+      "topics": [
+      ]
+    },
+    {
       "slug": "leap",
       "difficulty": 1,
       "topics": [
       ]
     },