Upgraded grunt-contrib-uglify to version 2.0

Author: stevenbenner

package.json

@@ -41,7 +41,7 @@
 		"grunt-contrib-cssmin": "~1.0",
 		"grunt-contrib-jshint": "~1.0",
 		"grunt-contrib-qunit": "~1.2",
-		"grunt-contrib-uglify": "~1.0",
+		"grunt-contrib-uglify": "~2.0",
 		"grunt-indent": "~0.1",
 		"grunt-jscs": "3.0",
 		"grunt-jsonlint": "~1.1",