chore(package): update lab to version 18.0.2

Closes #4

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "code": "^4.0.0",
     "coveralls": "^2.13.1",
     "hapi": "^16.1.1",
-    "lab": "^13.0.2"
+    "lab": "^18.0.2"
   },
   "dependencies": {
     "basic-utils": "^1.7.4",