Bump axios from 0.20.0 to 0.21.2 in /library

Bumps [axios](https://github.com/axios/axios) from 0.20.0 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md)
- [Commits](axios/axios@v0.20.0...v0.21.2)

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

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

Author: dependabot[bot]

library/package-lock.json

@@ -3,7 +3,7 @@
     "dependencies": {
         "@material-ui/core": "4.11.0",
         "@material-ui/icons": "4.9.1",
-        "axios": "0.20.0",
+        "axios": "0.21.2",
         "jquery": "3.5.1",
         "openvidu-browser": "2.20.0",
         "typeface-roboto": "0.0.75"