config.json in trackler-2.0.6.31

- old
+ new

@@ -1,11 +1,10 @@
 {
   "slug": "julia",
   "language": "Julia",
   "repository": "https://github.com/exercism/xjulia",
   "active": false,
-  "test_pattern": "TODO",
   "exercises": [
     {
       "slug": "hello-world",
       "difficulty": 1,
       "topics": [
@@ -92,9 +91,20 @@
       "difficulty": 2,
       "topics": [
         "strings",
         "unicode",
         "control-flow (if-else statements)"
+      ]
+    },
+    {
+      "slug": "sieve",
+      "difficulty": 2,
+      "topics": [
+        "control-flow (loops)",
+        "control-flow (conditionals)",
+        "mathematics",
+        "arrays",
+        "filtering"
       ]
     },
     {
       "slug": "trinary",
       "difficulty": 2,