chore(package): update mkdirp to version 1.0.1

Closes #36

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
     "eslint-plugin-import": "2.2.0",
     "istanbul": "0.4.5",
     "jsdom": "9.11.0",
-    "mkdirp": "0.5.1",
+    "mkdirp": "1.0.1",
     "mocha": "3.2.0",
     "uglify-js": "2.7.5"
   },