chore(deps): update dependency gts to v7

Author: renovate-bot

package.json

@@ -77,7 +77,7 @@
     "cross-env": "^7.0.3",
     "execa": "^5.0.0",
     "gaxios": "^7.1.0",
-    "gts": "^6.0.2",
+    "gts": "^7.0.0",
     "js-green-licenses": "^4.0.0",
     "jsdoc": "^4.0.4",
     "jsdoc-fresh": "^5.0.0",