Bump c8 from 8.0.1 to 9.0.0 (#111)

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
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -23,7 +23,7 @@
   "author": "Tommy Chen <tommy351@gmail.com> (https://zespia.tw)",
   "license": "MIT",
   "devDependencies": {
-    "c8": "^8.0.1",
+    "c8": "^9.0.0",
     "chai": "^4.3.7",
     "eslint": "^8.39.0",
     "eslint-config-hexo": "^5.0.0",