chore(package): update rimraf to version 2.6.1

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -54,7 +54,7 @@
     "gh-pages": "0.12.0",
     "http-server": "0.9.0",
     "raw-loader": "0.5.1",
-    "rimraf": "2.6.0",
+    "rimraf": "2.6.1",
     "source-map-explorer": "1.3.3",
     "style-loader": "0.13.1",
     "to-string-loader": "1.1.5",