Update bower.json

Author: NicolasRannou

bower.json

@@ -3,7 +3,7 @@
   "description": "Three JS Import for Polymer - no goodies, no bundles, nothing else. Just threejs.min.js.",
   "main": "three-import.html",
   "dependencies": {
-    "polymer": "Polymer/polymer#^1.4.0"
+    "polymer": "Polymer/polymer#^1.7.0"
   },
   "devDependencies": {
     "iron-component-page": "PolymerElements/iron-component-page#^1.0.0",