add dependency on WeakMap

dfreedm · dfreedm · commit 3c72759bccbf · 2013-11-08T14:17:40.000-08:00
diff --git a/bower.json b/bower.json
@@ -10,6 +10,9 @@
   "keywords": [
     "mutationobservers"
   ],
+  "dependencies": {
+    "Polymer/WeakMap": ">=0.0.20131107"
+  },
   "license": "BSD",
   "private": true,
   "ignore": [
