chore(package): update jsdom to version 15.1.1

Closes #6

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "babel-core": "^6.26.3",
     "enzyme": "^3.9.0",
     "enzyme-adapter-react-16": "^1.9.1",
-    "jsdom": "^13.2.0",
+    "jsdom": "^15.1.1",
     "nyc": "^13.3.0",
     "react": "^16.8.3",
     "react-dom": "^16.8.3",