fix(package): update mkdirp to version 1.0.2

Closes #154

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "chalk": "^2.3.2",
     "glob": "^7.1.2",
     "json-stable-stringify": "^1.0.1",
-    "mkdirp": "^0.5.1"
+    "mkdirp": "^1.0.2"
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",