chore(package): update react-router to version 5.1.0

Closes #107

Author: greenkeeper[bot]

package.json

@@ -81,7 +81,7 @@
     "react": "^16.7.0",
     "react-dom": "^16.7.0",
     "react-redux": "^7.0.3",
-    "react-router": "^3.0.3",
+    "react-router": "^5.1.0",
     "react-test-renderer": "^16.7.0",
     "redux": "^4.0.1",
     "redux-mock-store": "^1.3.0",