update for 0.2.2 release

Author: dfreedm

package.json

@@ -1,14 +1,15 @@
 {
   "name": "Polymer",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "devDependencies": {
     "mocha": "*",
     "chai": "*",
     "grunt": "*",
-    "grunt-contrib-uglify": "~0.3",
+    "grunt-contrib-uglify": "^0.4.0",
     "grunt-contrib-yuidoc": "*",
     "grunt-karma": "*",
     "karma-mocha": "*",
+    "karma-firefox-launcher": "*",
     "karma-ie-launcher": "*",
     "karma-safari-launcher": "*",
     "karma-script-launcher": "*",