build(deps-dev): bump @types/luxon from 1.27.0 to 2.0.4

Bumps [@types/luxon](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/luxon) from 1.27.0 to 2.0.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/luxon)

---
updated-dependencies:
- dependency-name: "@types/luxon"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

packages/integration/package.json

@@ -42,7 +42,7 @@
     "@backstage/config-loader": "^0.6.7",
     "@backstage/test-utils": "^0.1.17",
     "@types/jest": "^26.0.7",
-    "@types/luxon": "^1.25.0",
+    "@types/luxon": "^2.0.4",
     "msw": "^0.29.0"
   },
   "files": [