chore(deps): update dependency c8 to v9 (#1375)

* chore(deps): update dependency c8 to v9 * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: renovate-bot

package.json

@@ -77,7 +77,7 @@
  "@types/pumpify": "^1.4.1",
  "@types/sinon": "^10.0.0",
  "@types/uuid": "^9.0.0",
- "c8": "^8.0.1",
+ "c8": "^9.0.0",
  "codecov": "^3.6.5",
  "gapic-tools": "^0.1.8",
  "gts": "^5.0.0",