Upgraded grunt-contrib-cssmin to version 2.2

Author: stevenbenner

package.json

@@ -38,7 +38,7 @@
 		"grunt-contrib-concat": "~1.0",
 		"grunt-contrib-copy": "~1.0",
 		"grunt-contrib-csslint": "~2.0",
-		"grunt-contrib-cssmin": "~2.1",
+		"grunt-contrib-cssmin": "~2.2",
 		"grunt-contrib-jshint": "~1.1",
 		"grunt-contrib-qunit": "~2.0",
 		"grunt-contrib-uglify": "~2.3",