feat: upgrade react router to v6

package.json

@@ -36,7 +36,7 @@
     "@edx/brand": "npm:@edx/brand-openedx@1.1.0",
     "@edx/frontend-component-footer": "11.6.0",
     "@edx/frontend-component-header": "3.5.0",
-    "@edx/frontend-platform": "2.6.2",
+    "@edx/frontend-platform": "^3.6.0",
     "@edx/paragon": "^20.20.0",
     "@edx/tinymce-language-selector": "1.1.0",
     "@fortawesome/fontawesome-svg-core": "1.2.36",
@@ -55,7 +55,7 @@
     "react-dom": "16.14.0",
     "react-redux": "7.2.9",
     "react-router": "5.3.4",
-    "react-router-dom": "5.3.4",
+    "react-router-dom": "^6.0.0",
     "redux": "4.2.0",
     "regenerator-runtime": "0.13.11",
     "tinymce": "5.10.7"