chore(deps): update dependency gts to v3 (#317)

* chore(deps): update dependency gts to v3

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packages/grafeas/package.json

@@ -30,7 +30,7 @@
     "@types/node": "^16.0.0",
     "@types/sinon": "^10.0.0",
     "c8": "^7.0.0",
-    "gts": "^2.0.0",
+    "gts": "^3.0.0",
     "jsdoc": "^3.6.2",
     "jsdoc-fresh": "^1.0.1",
     "jsdoc-region-tag": "^1.0.2",