chore(package): update rimraf to version 2.6.3

Closes #34

Author: greenkeeper[bot]

package.json

@@ -55,7 +55,7 @@
     "nsp": "^2.6.3",
     "numeral": "^2.0.6",
     "open": "0.0.5",
-    "rimraf": "2.6.1",
+    "rimraf": "2.6.3",
     "style-loader": "^0.16.1",
     "surge": "^0.19.0",
     "webpack": "^2.3.3",