fix: upgrade react-router-dom from 5.2.0 to 5.3.4

Snyk has created this PR to upgrade react-router-dom from 5.2.0 to 5.3.4.

See this package in npm:
https://www.npmjs.com/package/react-router-dom

See this project in Snyk:
https://app.snyk.io/org/sureshungarala/project/b54ac240-6b3a-46a2-92bf-ead70ae37cd9?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -14,7 +14,7 @@
     "node-sass": "^4.14.1",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
-    "react-router-dom": "^5.1.2",
+    "react-router-dom": "^5.3.4",
     "react-scripts": "^3.4.3",
     "source-map-explorer": "^2.5.0",
     "typescript": "^3.9.9"