phone-number: Add topics to resolve #856

ilya-khadykin · web-flow · commit 12b5061db635 · 2017-10-15T16:41:15.000+03:00
diff --git a/config.json b/config.json
@@ -600,7 +600,10 @@
       "unlocked_by": null,
       "difficulty": 1,
       "topics": [
-
+        "pattern_matching",
+        "conditionals",
+        "strings",
+        "regular_expressions"
       ]
     },
     {
