Bump axios from 0.19.2 to 0.21.1 in /client

Bumps [axios](https://github.com/axios/axios) from 0.19.2 to 0.21.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.1/CHANGELOG.md)
- [Commits](axios/axios@v0.19.2...v0.21.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

client/package-lock.json

@@ -14,7 +14,7 @@
     "@types/react-dom": "^16.9.8",
     "acorn": "^7.1.1",
     "autosize": "^4.0.2",
-    "axios": "^0.19.2",
+    "axios": "^0.21.1",
     "bootstrap": "^4.4.1",
     "dotenv": "^8.2.0",
     "express": "^4.17.1",