chore(package): update hapi to version 18.1.0

Closes #47

Author: greenkeeper[bot]

package.json

@@ -90,7 +90,7 @@
     "babel-runtime": "^6.26.0",
     "coveralls": "^3.0.0",
     "cross-env": "^5.1.0",
-    "hapi": "^17.2.3",
+    "hapi": "^18.1.0",
     "jest": "^22.0.0",
     "nodemon": "^1.9.0",
     "npm-run-all": "^4.0.1",