adds react router dom

package.json

@@ -32,6 +32,7 @@
         "react-dom": "^16.8.1",
         "react-modal": "^3.8.1",
         "react-redux": "^6.0.0",
+        "react-router-dom": "^4.3.1",
         "react-rte": "^0.16.1",
         "react-transition-group": "^2.5.3",
         "react-window-size-listener": "^1.2.3",