Update dev-dependencies

Author: wooorm

package.json

@@ -49,7 +49,7 @@
   },
   "devDependencies": {
     "@types/node": "^20.0.0",
-    "c8": "^7.0.0",
+    "c8": "^8.0.0",
     "mdast-util-from-markdown": "^1.0.0",
     "prettier": "^2.0.0",
     "remark-cli": "^11.0.0",