chore(package): update node-sass to version 3.11.2

https://greenkeeper.io/

package.json

@@ -230,7 +230,7 @@
     "karma-sourcemap-loader": "0.3.7",
     "karma-webpack": "1.8.0",
     "mocha": "3.1.2",
-    "node-sass": "3.11.1",
+    "node-sass": "3.11.2",
     "po2json": "0.4.5",
     "postcss-loader": "1.1.0",
     "react-addons-test-utils": "15.3.2",