chore(package): update jsdom to version 15.1.1

Closes #61

Author: greenkeeper[bot]

package.json

@@ -58,7 +58,7 @@
     "gzip-size": "^5.0.0",
     "jest": "^24.7.1",
     "jest-enzyme": "^7.0.1",
-    "jsdom": "^14.0.0",
+    "jsdom": "^15.1.1",
     "pretty-bytes": "^5.0.0",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",