Bump eslint from 8.57.0 to 9.0.0

Bumps [eslint](https://github.com/eslint/eslint) from 8.57.0 to 9.0.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v8.57.0...v9.0.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -22,7 +22,7 @@
     "url": "https://github.com/textpattern/textpattern/issues"
   },
   "devDependencies": {
-    "eslint": "~8",
+    "eslint": "~9",
     "phplint": "~2",
     "uglify-js": "3.17.4"
   },