Update jsdom to the latest version 🚀 (#68)

## The devDependency [jsdom](https://github.com/jsdom/jsdom) was updated from `12.2.0` to `13.0.0`.
This version is **not covered** by your **current version range**.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

---

[Find out more about this release](https://github.com/jsdom/jsdom).

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package.json

@@ -45,7 +45,7 @@
     "html-loader": "^0.5.1",
     "html-webpack-plugin": "^3.0.0",
     "istanbul": "^0.4.5",
-    "jsdom": "^12.2.0",
+    "jsdom": "^13.0.0",
     "mocha": "^5.0.0",
     "nps": "^5.7.1",
     "nps-utils": "^1.5.0",