Bump date-fns from 2.27.0 to 2.28.0

Bumps [date-fns](https://github.com/date-fns/date-fns) from 2.27.0 to 2.28.0.
- [Release notes](https://github.com/date-fns/date-fns/releases)
- [Changelog](https://github.com/date-fns/date-fns/blob/master/CHANGELOG.md)
- [Commits](date-fns/date-fns@v2.27.0...v2.28.0)

---
updated-dependencies:
- dependency-name: date-fns
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -34,7 +34,7 @@
     "bulma-toast": "2.4.1",
     "core-js": "3.20.1",
     "d3": "7.2.1",
-    "date-fns": "2.27.0",
+    "date-fns": "2.28.0",
     "elm-pep": "1.0.6",
     "file-saver": "2.0.5",
     "ol": "6.9.0",