chore(package): update mocha to version 5.0.2

Closes #37

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "coveralls": "^2.13.1",
     "eslint-plugin-security": "^1.4.0",
     "jsdoc": "^3.4.3",
-    "mocha": "^3.4.2",
+    "mocha": "^5.0.2",
     "npm-install-peers": "^1.1.0",
     "nsp": "^2.6.3",
     "nyc": "^11.0.3",