🐛 unlock react-router version back

https://github.com/ReactTraining/react-router/issues/6811#issuecomment-505894103

package.json

@@ -170,7 +170,7 @@
     "react-infinite-scroller": "^1.2.4",
     "react-intl": "^2.9.0",
     "react-resizable": "^1.8.0",
-    "react-router": "3.2.1",
+    "react-router": "^3.2.3",
     "react-router-dom": "^5.0.1",
     "react-sticky": "^6.0.3",
     "react-test-renderer": "^16.8.6",