Bump axios from 0.19.2 to 0.21.2 in /React Client/web

Bumps [axios](https://github.com/axios/axios) from 0.19.2 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.2/CHANGELOG.md)
- [Commits](axios/axios@v0.19.2...v0.21.2)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: direct:production
...

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

Author: dependabot[bot]

React Client/web/package.json

@@ -10,7 +10,7 @@
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",
     "ace-builds": "^1.4.11",
-    "axios": "^0.19.2",
+    "axios": "^0.21.2",
     "dayjs": "^1.8.25",
     "react": "^16.13.1",
     "react-ace": "^8.1.0",