chore(deps): update testing tools

Author: renovate[bot]

package.json

@@ -47,8 +47,8 @@
     "@types/multer": "^1.4.11",
     "@types/node": "^20.11.6",
     "@types/supertest": "^6.0.2",
-    "c8": "^8.0.1",
-    "chai": "^4.4.1",
+    "c8": "^9.1.0",
+    "chai": "^5.0.3",
     "chai-as-promised": "^7.1.1",
     "chai-subset": "^1.6.0",
     "eslint-formatter-gha": "^1.4.3",