added package

Author: wrighbr

package.json

@@ -39,8 +39,9 @@
     "@backstage/core-app-api": "^1.0.0",
     "@backstage/dev-utils": "^1.0.0",
     "@backstage/test-utils": "^1.0.0",
-    "react": "^17.0.0",
-    "react-dom": "^17.0.0",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2",
+    "react-router": "6.3.0",
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^12.1.2",
     "@testing-library/user-event": "^13.1.8",