tracks/julia/config.json in trackler-2.1.0.48 vs tracks/julia/config.json in trackler-2.1.0.49

@@ -223,9 +223,20 @@
         "strings",
         "randomness"
       ]
     },
     {
+      "slug": "complex-numbers",
+      "difficulty": 2,
+      "topics": [
+        "structs",
+        "mathematics",
+        "methods",
+        "multiple dispatch",
+        "function extension"
+      ]
+    },
+    {
       "slug": "rotational-cipher",
       "difficulty": 2,
       "topics": [
         "string literals",
         "metaprogramming",