config.json: add topic Stack to exercise Forth

exercism · Apr 7, 2017 · 78232d0 · 78232d0
1 parent 4dcca22
commit 78232d0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/config.json b/config.json
@@ -497,7 +497,8 @@
       "difficulty": 10,
       "topics": [
         "Define type",
-        "Either"
+        "Either",
+        "Stack"
       ]
     },
     {