fix(package): update fs-extra to version 2.1.2

Closes #135

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "debug": "^2.3.2",
     "docopt": "^0.6.2",
     "figures": "^2.0.0",
-    "fs-extra": "^1.0.0",
+    "fs-extra": "^2.1.2",
     "get-mongodb-version": "^1.0.0",
     "lodash.defaults": "^4.2.0",
     "lodash.difference": "^4.1.1",