upgrade react-router and react-router-dom to gain access to new hooks

platform/viewer/package.json

@@ -67,8 +67,8 @@
     "core-js": "^3.2.1",
     "cornerstone-math": "^0.1.8",
     "cornerstone-tools": "4.15.1",
-    "dcmjs": "^0.12.2",
     "cornerstone-wado-image-loader": "^3.1.2",
+    "dcmjs": "^0.12.2",
     "dicom-parser": "^1.8.3",
     "dicomweb-client": "^0.4.4",
     "dotenv-webpack": "^1.7.0",
@@ -84,8 +84,8 @@
     "react-i18next": "^10.11.0",
     "react-redux": "^7.1.0",
     "react-resize-detector": "^4.2.0",
-    "react-router": "^5.0.1",
-    "react-router-dom": "^5.0.1",
+    "react-router": "^5.2.0",
+    "react-router-dom": "^5.2.0",
     "react-transition-group": "^4.1.1",
     "redux": "^4.0.1",
     "redux-logger": "^3.0.6",