Bump axios from 0.19.0 to 0.21.1 in /client

Bumps [axios](https://github.com/axios/axios) from 0.19.0 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@v0.19.0...v0.21.1)

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

Author: dependabot[bot]

client/package-lock.json

@@ -8,7 +8,7 @@
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
-    "axios": "^0.19.0",
+    "axios": "^0.21.1",
     "bulma": "^0.8.0",
     "core-js": "^3.3.2",
     "jwt-decode": "^2.2.0",