chore(package): update lab to version 13.0.3

Closes #25

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -45,7 +45,7 @@
     "coveralls": "^2.11.9",
     "eslint": "^3.1.0",
     "eslint-watch": "^2.1.10",
-    "lab": "^11.0.0",
+    "lab": "^13.0.3",
     "npm-run-all": "^3.0.0",
     "onchange": "^3.0.0"
   }