Bump core-js from 3.17.3 to 3.21.0 in /settings

Bumps [core-js](https://github.com/zloirock/core-js) from 3.17.3 to 3.21.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/compare/v3.17.3...v3.21.0)

---
updated-dependencies:
- dependency-name: core-js
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

settings/package.json

@@ -25,7 +25,7 @@
   ],
   "dependencies": {
     "axios": "^0.21.4",
-    "core-js": "^3.17.3",
+    "core-js": "^3.21.0",
     "debounce": "^1.2.1",
     "vuex": "^3.5.1"
   },