chore(package): update grunt-contrib-compress to version 1.2.0

http://greenkeeper.io/

package.json

@@ -29,7 +29,7 @@
     "grunt": "^0.4.5",
     "grunt-bump": "0.7.0",
     "grunt-contrib-clean": "^1.0.0",
-    "grunt-contrib-compress": "^1.1.1",
+    "grunt-contrib-compress": "^1.2.0",
     "grunt-contrib-copy": "^1.0.0",
     "grunt-gh-pages": "^1.0.0",
     "grunt-text-replace": "^0.4.0",