chore(package): update hoek to version 6.1.3

Closes #40

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "chai-immutable": "^1.6.0",
     "chai-string": "^1.4.0",
     "eslint": "^5.0.0",
-    "hoek": "^5.0.3",
+    "hoek": "^6.1.3",
     "karma": "^2.0.5",
     "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^2.2.0",