chore(deps): update dependency gts to v6

Author: renovate[bot]

package.json

@@ -58,7 +58,7 @@
     "chai": "^5.2.0",
     "cross-env": "^7.0.2",
     "eslint": "^8.57.1",
-    "gts": "^5.3.1",
+    "gts": "^6.0.0",
     "mocha": "^11.1.0",
     "puppeteer": "^24.6.1",
     "rimraf": "^6.0.1",