Merge pull request #258 from dtinth/fix-outdated-uglify

Bump grunt-contrib-uglify to ~0.6.0

Author: guybedford

package.json

@@ -25,7 +25,7 @@
     "grunt": "~0.4.1",
     "grunt-contrib-concat": "^0.5.0",
     "grunt-contrib-jshint": "~0.6.0",
-    "grunt-contrib-uglify": "~0.2.2",
+    "grunt-contrib-uglify": "~0.6.0",
     "grunt-esnext": "0.0.3",
     "grunt-string-replace": "^0.2.7"
   },