Bump the fullcalendar group across 1 directory with 2 updates

Bumps the fullcalendar group with 2 updates in the /frontend directory: [@fullcalendar/angular](https://github.com/fullcalendar/fullcalendar-angular) and [@fullcalendar/core](https://github.com/fullcalendar/fullcalendar/tree/HEAD/packages/core-types).


Updates `@fullcalendar/angular` from 6.1.21 to 7.0.0
- [Release notes](https://github.com/fullcalendar/fullcalendar-angular/releases)
- [Changelog](https://github.com/fullcalendar/fullcalendar-angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/fullcalendar/fullcalendar-angular/commits)

Updates `@fullcalendar/core` from 6.1.21 to 7.0.0
- [Release notes](https://github.com/fullcalendar/fullcalendar/releases)
- [Changelog](https://github.com/fullcalendar/fullcalendar/blob/main/CHANGELOG.md)
- [Commits](https://github.com/fullcalendar/fullcalendar/commits/v7.0.0/packages/core-types)

---
updated-dependencies:
- dependency-name: "@fullcalendar/angular"
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: fullcalendar
- dependency-name: "@fullcalendar/core"
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: fullcalendar
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -80,9 +80,9 @@
     "@braintree/sanitize-url": "^7.1.2",
     "@datorama/akita": "^8.0.1",
     "@floating-ui/dom": "^1.2.1",
-    "@fullcalendar/angular": "^6.1.21",
+    "@fullcalendar/angular": "^7.0.0",
     "@fullcalendar/common": "^5.11.5",
-    "@fullcalendar/core": "^6.1.21",
+    "@fullcalendar/core": "^7.0.0",
     "@fullcalendar/daygrid": "^6.1.21",
     "@fullcalendar/interaction": "^6.1.21",
     "@fullcalendar/list": "^6.1.21",