Bump react-router from 5.2.1 to 6.0.2 in /packages/ra-test

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) from 5.2.1 to 6.0.2.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Commits](https://github.com/remix-run/react-router/commits/v6.0.2/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

packages/ra-test/package.json

@@ -43,7 +43,7 @@
         "react": "^17.0.0",
         "react-dom": "^17.0.0",
         "react-redux": "^7.1.0",
-        "react-router": "^5.1.0",
+        "react-router": "^6.0.2",
         "react-router-dom": "^5.1.0",
         "react-test-renderer": "^16.9.0 || ^17.0.0",
         "redux": "^3.7.2 || ^4.0.3"
@@ -53,7 +53,7 @@
         "react": "^16.9.0 || ^17.0.0",
         "react-dom": "^16.9.0 || ^17.0.0",
         "react-redux": "^7.1.0",
-        "react-router": "^5.1.0",
+        "react-router": "^6.0.2",
         "react-router-dom": "^5.1.0",
         "redux": "^3.7.2 || ^4.0.3"
     },