chore(package): update mocha to version 7.1.2

Closes #188

package.json

@@ -60,6 +60,6 @@
     "eslint-config-airbnb-base": "13.1.0",
     "eslint-plugin-import": "2.14.0",
     "glob": "7.1.3",
-    "mocha": "5.2.0"
+    "mocha": "7.1.2"
   }
 }