chore(greenkeeper): Update mkdirp to version 1.0.3.

Closes #77.

Author: greenkeeper[bot]

packages/@opticss/demo-app/package.json

@@ -59,7 +59,7 @@
     "babel-preset-env": "^1.6.0",
     "browserify": "amiller-gh/browserify",
     "gzip-js": "^0.3.2",
-    "mkdirp": "^0.5.1",
+    "mkdirp": "^1.0.3",
     "moo": "^0.5.0",
     "nearley": "^2.10.3",
     "rimraf": "^2.6.2",