fix(package): update mkdirp to version 1.0.4

Closes #35

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/NodeOS/nodeos-mount-utils",
   "dependencies": {
-    "mkdirp": "^0.5.1",
+    "mkdirp": "^1.0.4",
     "nodeos-mount": "^0.3.1"
   },
   "devDependencies": {