Bump luxon from 1.19.3 to 1.28.1

Bumps [luxon](https://github.com/moment/luxon) from 1.19.3 to 1.28.1.
- [Release notes](https://github.com/moment/luxon/releases)
- [Changelog](https://github.com/moment/luxon/blob/master/CHANGELOG.md)
- [Commits](moment/luxon@1.19.3...1.28.1)

---
updated-dependencies:
- dependency-name: luxon
  dependency-type: direct:production
...

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

package.json

@@ -30,7 +30,7 @@
     "@angular/platform-browser-dynamic": ">=8.0.0",
     "@angular/router": ">=8.0.0",
     "d3": "^5.9.2",
-    "luxon": "^1.16.0"
+    "luxon": "^1.28.1"
   },
   "repository": {
     "type": "git",
@@ -49,7 +49,7 @@
     "@fortawesome/fontawesome-svg-core": "^1.2.22",
     "@fortawesome/free-solid-svg-icons": "^5.10.2",
     "d3": "^5.9.2",
-    "luxon": "^1.16.0"
+    "luxon": "^1.28.1"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "=0.803.17",