chore(package): update shower-ribbon to version 2.0.4

http://greenkeeper.io/

package.json

@@ -23,7 +23,7 @@
   "dependencies": {
     "shower-core": "^2.0.5",
     "shower-material": "^1.0.3",
-    "shower-ribbon": "^2.0.3"
+    "shower-ribbon": "^2.0.4"
   },
   "devDependencies": {
     "grunt": "^0.4.5",