chore(deps-dev): bump c8 from 7.14.0 to 8.0.0 (#117)

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

Author: dependabot[bot]

package.json

@@ -50,7 +50,7 @@
     },
     "devDependencies": {
         "@eslint-community/eslint-plugin-mysticatea": "^15.3.0",
-        "c8": "^7.13.0",
+        "c8": "^8.0.0",
         "dot-prop": "^7.2.0",
         "eslint": "^8.39.0",
         "mocha": "^9.2.2",