Update react-router to the latest version 🚀 (#1093)

* fix(package): update react-router to version 5.0.1

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -59,7 +59,7 @@
     "react-dnd-html5-backend": "7.4.4",
     "react-dom": "16.8.6",
     "react-helmet": "5.2.1",
-    "react-router": "4.4.0-beta.8",
+    "react-router": "5.0.1",
     "react-router-dom": "4.4.0-beta.8"
   },
   "devDependencies": {