chore(deps-dev): bump gts from 5.3.1 to 6.0.0 (#665)

Bumps [gts](https://github.com/google/gts) from 5.3.1 to 6.0.0.
- [Release notes](https://github.com/google/gts/releases)
- [Changelog](https://github.com/google/gts/blob/main/CHANGELOG.md)
- [Commits](google/gts@v5.3.1...v6.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.prettierrc.js

@@ -1,3 +1,3 @@
 module.exports = {
-  ...require('gts/.prettierrc.json')
-}
+  ...require('gts/.prettierrc.json'),
+};

lib/index.js

@@ -28,7 +28,7 @@
     "@vercel/ncc": "^0.38.2",
     "all-contributors-cli": "^6.26.1",
     "eslint-config-prettier": "^9.1.0",
-    "gts": "^5.3.1",
+    "gts": "^6.0.0",
     "husky": "^9.1.6",
     "typescript": "~5.6.3"
   },