chore(package): update mocha to version 7.2.0

Closes #7

Author: greenkeeper[bot]

package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "chai": "^4.2.0",
     "hapi": "^16.7.0",
-    "mocha": "^6.1.3"
+    "mocha": "^7.2.0"
   },
   "peerDependencies": {
     "hapi": "> ^16.7.0"