Bump @coreui/coreui from 2.1.16 to 4.2.6

Bumps [@coreui/coreui](https://github.com/coreui/coreui) from 2.1.16 to 4.2.6.
- [Release notes](https://github.com/coreui/coreui/releases)
- [Changelog](https://github.com/coreui/coreui/blob/main/CHANGELOG.md)
- [Commits](coreui/coreui@v2.1.16...v4.2.6)

---
updated-dependencies:
- dependency-name: "@coreui/coreui"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -73,7 +73,7 @@
     "watch-pug": "nodemon -e pug -x \"npm run pug\""
   },
   "dependencies": {
-    "@coreui/coreui": "^2.1.16",
+    "@coreui/coreui": "^4.2.6",
     "@coreui/coreui-plugin-chartjs-custom-tooltips": "^1.3.1",
     "@coreui/icons": "0.3.0",
     "bootstrap": "^4.5.0",