bump helios

bower.json

@@ -28,6 +28,6 @@
   "devDependencies": {
     "amber-contrib-legacy": "^0.2.1",
     "amber-ide-starter-dialog": "^0.1.0",
-    "helios": "^0.3.4"
+    "helios": "^0.5.2"
   }
 }