chore(package): update dependencies

https://greenkeeper.io/

package.json

@@ -41,7 +41,7 @@
     "acho": "~3.1.0",
     "acho-skin-cli": "~1.0.0",
     "chalk": "~1.1.1",
-    "coffee-script": "~1.11.0",
+    "coffee-script": "~1.12.2",
     "existential-default": "~1.3.1",
     "json-is-equal": "~1.0.0",
     "jsonlint": "~1.6.2",