Bump c8 from 8.0.1 to 9.0.0

Bumps [c8](https://github.com/bcoe/c8) from 8.0.1 to 9.0.0.
- [Release notes](https://github.com/bcoe/c8/releases)
- [Changelog](https://github.com/bcoe/c8/blob/main/CHANGELOG.md)
- [Commits](bcoe/c8@v8.0.1...v9.0.0)

---
updated-dependencies:
- dependency-name: c8
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -31,7 +31,7 @@
     "gh-release": "^7.0.2",
     "npm-run-all2": "^6.0.4",
     "standard": "^17.0.0",
-    "c8": "^8.0.0"
+    "c8": "^9.0.0"
   },
   "homepage": "https://github.com/bcomnes/invoicer",
   "keywords": [