chore(package): update mocha to version 7.2.0

Closes #44

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "eslint-config-airbnb-base": "^14.0.0",
     "eslint-plugin-import": "^2.18.2",
     "in-publish": "^2.0.0",
-    "mocha": "^5.2.0",
+    "mocha": "^7.2.0",
     "safe-publish-latest": "^1.1.3"
   },
   "dependencies": {