chore(package): update hapi to version 15.0.2

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -48,7 +48,7 @@
     "aegir": "^6.0.0",
     "chai": "^3.5.0",
     "gulp": "^3.9.1",
-    "hapi": "^14.1.0",
+    "hapi": "^15.0.2",
     "interface-ipfs-core": "^0.14.2",
     "ipfsd-ctl": "^0.14.0",
     "pre-commit": "^1.1.3",